Liabilities / Assets
12th percentile
Higher debt load relative to assets than 12% of similar nonprofits.
EIN 04-2108374 • 501(c)3 • Boston, MA
Profile
To promote understanding of the history of massachusetts and the nation by collecting and communicating materials and resources that foster historical knowledge.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
12th percentile
Higher debt load relative to assets than 12% of similar nonprofits.
Liabilities / Revenue
59th percentile
Higher debt load relative to revenue than 59% of similar nonprofits.
Net Margin
1st percentile
Higher net margin than 1% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
24th percentile
Faster asset growth than 24% of similar nonprofits.
Revenue Growth
2nd percentile
Faster revenue growth than 2% of similar nonprofits.
Assets
Up$150,496,088
Up $9,194,692 (+6.5%) from 2023
Liabilities
Up$2,351,268
Up $190,539 (+8.8%) from 2023
Net Assets
Up$148,144,820
Up $9,004,153 (+6.5%) from 2023
Revenue
Up$7,150,440
Up $3,451,816 (+93%) from 2023
Expenses
Up$10,548,645
Up $1,068,905 (+11%) from 2023
Net Income
Up-$3,398,205
Up $2,382,911 (+41%) from 2023
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
The Massachusetts Historical Society is a center of research and learning dedicated to a deeper understanding of the American experience. Through its collections, scholarly pursuits, and public programs, the Society seeks to nurture a greater appreciation for American history and for the ideas, values, successes, and failures that bind us together as a nation.
The mhs seeks to make american history relevant and accessible to anyone.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $127,469,734 | $136,369,228 | ▲ $8,899,494 |
| Land, Buildings, and Equipment, Net | $9,494,982 | $9,031,462 | ▼ $463,520 |
| Savings and Temporary Cash Investments | $3,209,207 | $3,376,526 | ▲ $167,319 |
| Cash and Non-Interest-Bearing Accounts | $386,891 | $861,654 | ▲ $474,763 |
| Pledges and Grants Receivable | $130,562 | $248,682 | ▲ $118,120 |
| Prepaid Expenses and Deferred Charges | $199,992 | $205,402 | ▲ $5,410 |
| Accounts Receivable | $41,000 | $12,537 | ▼ $28,463 |
| Total Assets | $141,301,396 | $150,496,088 | ▲ $9,194,692 |
| Other Assets Total | $369,028 | $390,597 | ▲ $21,569 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $833,909 | $1,132,454 | ▲ $298,545 |
| Mortgage Notes Payable Secured by Investment Property | $792,337 | $688,361 | ▼ $103,976 |
| Deferred Revenue | $335,067 | $328,699 | ▼ $6,368 |
| Other Liabilities | $199,416 | $201,754 | ▲ $2,338 |
| Total Liabilities | $2,160,729 | $2,351,268 | ▲ $190,539 |
| Net Assets / Fund Balance | |||
| Net Assets With Donor Restrictions | $87,570,098 | $92,064,428 | ▲ $4,494,330 |
| Net Assets Without Donor Restrictions | $51,570,569 | $56,080,392 | ▲ $4,509,823 |
| Total Net Assets Fund Balance | $139,140,667 | $148,144,820 | ▲ $9,004,153 |
| Total Liabilities and Net Assets / Fund Balance | $141,301,396 | $150,496,088 | ▲ $9,194,692 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Leasehold Improvements | $8,567,111 | $8,032,931 | $16,600,042 |
| Equipment | $241,167 | $443,609 | $684,776 |
| Buildings | $0 | $470,422 | $470,422 |
| Land | $200,000 | - | $200,000 |
| Other Land Buildings | $23,184 | - | $23,184 |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2023 | $127,469,734 | $970,041 | ▲ $14,652,851 | $6,657,382 | $136,369,228 |
| 2022 | $127,669,448 | $253,467 | ▲ $5,587,956 | $5,927,216 | $127,469,734 |
| 2021 | $137,542,351 | $60,000 | ▼ $5,799,985 | $3,946,173 | $127,669,448 |
| 2020 | $89,532,291 | $259,450 | ▲ $51,608,214 | $3,812,183 | $137,542,351 |
| 2019 | $87,613,214 | $235,571 | ▲ $5,408,354 | $3,641,368 | $89,532,291 |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Catherine Allgor | President | FT | $290,763 | $44,191 | $334,954 |
| Amanda H Clark Macmullan | Senior VP for Programs & External Affairs | FT | $176,654 | $28,487 | $205,141 |
| Amanda H Clark Macmullan | Senior VP for Programs & External Af | - | $176,654 | $28,487 | $205,141 |
| Brenda M Lawson | Senior VP of Collections & Content Development | FT | $169,944 | $32,253 | $202,197 |
| Brenda M Lawson | Senior VP of Collections & Content D | - | $169,944 | $32,253 | $202,197 |
| Victoria Mckay | Director of Development | FT | $120,620 | $43,443 | $164,063 |
| Peter Drummey | Chief Historian & Librarian | FT | $144,286 | $13,291 | $157,577 |
| Kanisorn Wongsrichanalai | Director of Research | FT | $124,847 | $17,320 | $142,167 |
| Sara Martin | Editor in Chief | FT | $126,903 | $14,424 | $141,327 |
| Carol W Knauff | VP Fo Programs & External Affairs | FT | $102,806 | $34,873 | $137,679 |
| Name | Title |
|---|---|
| - | Chair |
| - | Chair of Advisors |
| - | Vice Chair |
| - | Trustee |
| Benjamin C Adams | Trustee |
| Edward Baldini | Trustee |
| G Marshall Moriarty | Trustee |
| Levin H Campbell Jr | Trustee |
| Newcomb Stillwell | Trustee |
| Oliver F Ames | Trustee |
| - | Secretary |
| - | Treasurer |
| Contractor | Services | Location | Compensation |
|---|---|---|---|
| Winter Street Cfo LLC | Cfo Consultant | 125 ROCKY BROOK ROAD, North Andover, MA 01845 | $137,211 |
| Comtec Solutions LLC | It Services | 100 ELMGROVE PART, Rochester, NY 14624 | $106,191 |
| Sage Search Partners LLC | Executive Search Firm | 19 HAWTHORNE AVENUE, Newton, MA 02466 | $100,670 |
| Contribution Type | Contribution Count | Reported Amount | Valuation Method |
|---|---|---|---|
| Securities Publicly Traded | 6 | $510,967 | Fair Market Value (FMV) |
| Total Noncash Contributions | 6 | $510,967 | - |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $6,489,346 |
| Other Expenses | $3,911,236 |
| Total Fundraising Expense | $1,071,357 |
| Grants and Similar Amounts Paid | $148,063 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $3,634,590 | $779,684 | $587,130 | $5,001,404 |
| Fees for Service Investment Mgmnt Fees | - | $1,134,129 | - | $1,134,129 |
| Other Employee Benefits | $473,414 | $77,604 | $68,382 | $619,400 |
| Occupancy | $452,425 | $13,751 | $68,569 | $534,745 |
| Fees for Services Other | $48,594 | $428,632 | $34,684 | $511,910 |
| Depreciation Depletion | $332,820 | $79,067 | $80,906 | $492,793 |
| Payroll Taxes | $262,185 | $62,188 | $40,648 | $365,021 |
| Current Officers, Directors, Trustees, and Key Employees | - | $346,259 | - | $346,259 |
| Information Technology | $189,935 | $49,794 | $51,655 | $291,384 |
| Pension Plan Contributions | $117,503 | $21,074 | $18,685 | $157,262 |
| Grants to Domestic Individuals | $148,063 | - | - | $148,063 |
| Insurance | $12,016 | $87,730 | - | $99,746 |
| Fees for Services Legal | - | $89,735 | - | $89,735 |
| All Other Expenses | $48,291 | $30,577 | - | $78,868 |
| Other Expenses | $46,526 | $43,426 | $17,109 | $63,635 |
| Office Expenses | $27,934 | $19,361 | $11,691 | $58,986 |
| Travel | $19,428 | $16,262 | $803 | $36,493 |
| Fees for Services Accounting | - | $32,498 | - | $32,498 |
| Interest | - | $30,169 | - | $30,169 |
| Conferences and Meetings | $3,726 | - | - | $3,726 |
| Advertising | $3,718 | - | - | $3,718 |
| Total Functional Expenses | $6,135,348 | $3,341,940 | $1,071,357 | $10,548,645 |
| Line Item | Amount |
|---|---|
| Total Expenses per Form 990 | $10,548,645 |
| Total Expenses per Audited Statements | $9,516,006 |
| Expenses per Audited Statements | $9,348,500 |
| Expenses Not Reported on Financial Statements | $1,200,145 |
| Expenses Not Reported on Form 990 | $167,506 |
| Other Expense Adjustments | $66,016 |
| Region | Activity | Services | Offices | Employees | Spending |
|---|---|---|---|---|---|
| Central America and the Caribbean - Antigua & Barbuda, Aruba, Bahamas, | Investments | - | 0 | 0 | $19,047,210 |
| Line Item | Amount |
|---|---|
| Fundraising Direct Expenses | $159,432 |
| Fundraising Gross Income | $31,044 |
| Professional Fundraising Fees | $0 |
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| Making History Gala | $424,658 | $31,044 | $7,800 | $23,244 |
| Total Events | $424,658 | $31,044 | $159,432 | $-128,388 |
| Liability | Amount |
|---|---|
| Split-interest Agreements | $201,754 |
“During the year the board engaged with winter street cfo, llc to perform the cfo work. Winter street is overseen by the president and the board of directors.”
“The society has elected members, known as fellows, as well as general membership, which do not have voting rights.”
“The society has elected members who do not have voting rights. In addition, the society is governed by the board of trustees who are nominated and elected. The board of trustees are responsible for almost all governance decisions.”
“A draft copy of the form 990 is made available to all trustees for comment prior to filing.”
“Annually, the governance committee distributes a questionnaire to all trustees, officers and key employees requiring them to disclose any conflicts of interest. The society requires that all persons to whom the questionnaire is distributed complete it in a timely manner. The governance committee reviews the conflict of interest policy questionaires as they are completed along with the board disclosures annually, and will follow up on any potential or noted conflicts.”
“The chair of the board and the officers review the performance of the president/ceo and comparable compensation data and determine his/her compensation. The last year the process was perfromed was 2024. Each year the president, as ceo, reviews the performance of the key employees and comparable compensation data and reports his/her decision to the board of trustees, which are incorporated into the annual budget of the organization which is approved by the board of trustees. The deliberations and decisions of the president are contemporaneously recorded as is the approval of the budget by the board of trustees. The last year this process was performed was in 2024.”
“The society's annual audited financial statements, form 990 and massachusetts form pc are available to the public on its website at masshist.org. These documents are also available on the massachusetts attorney general's website at www.charities.ago.state.ma.us/charities/. The society's bylaws and conflict of interest policy are available on the society's website. The society will make printed copies available upon written request.”
“As part of its mission, the mhs maintains its own publishing program and hosts the offices of the adams papers editorial project. Founded in 1954, the project prepares a comprehensive edition, in print and digital formats, of the manuscripts written and received by three generation of the adams family of braintree and quincy, massachusetts. The adams family papers manuscript collection at the mhs forms the nucleus of the project, although the editors have gathered more than 30,000 copies of additional adams writings from hundreds of libraries, institutions, and individuals in the united states and abroad. To date, nearly 60 print volumes have been published by harvard university press, most of which are available online as part of the adams papers digital edition.”
“The collections, which were acquired through purchases and contributions since the society's inception, are not recognized as assets on the statements of financial position. Purchase of collection items are recorded as decreases in net assets without donor restrictions if purchased with net assets without donor restrictions and as decreases in net assets with donor restrictions if purchased with donor-restricted assets. Contributions of collection items are not recognized in the statement of activities or as assets. Proceeds from deaccessions are reflected in the statement of activities based on absence or existence and nature of donor-imposed restrictions.”
“The society's collections are made up of manuscripts, rare books, pamphlets, reference works, art objects, and other artifacts of historical significance that are held for educational, research, historic, and curatorial purposes. Each of these items is cataloged, preserved, and cared for, and activities verifying their existence and assessing their condition are performed continually.”
“The society classifies as net assets with donor restrictions (a) the original value of gifts donated to the permanent endowment, (b) the original value of subsequent gifts to the permanent endowment, and (c) accumulations to the permanent endowment made in accordance with the direction of the applicable donor's gift instructions at the time the accumulation is made to the fund. The society has a policy of appropriating for distribution each year a percentage of invested assets computed on a trailing 12-quarter quarterly average of its endowment asset market values. In establishing this policy, the society considered the long-term expected returns on its endowment assets. Accordingly, over the long-term, the society expects the spending policy to allow its endowment to grow at a rate in excess of inflation. This is consistent with the society's objective to maintain the purchasing power of the endowment assets. The cumulative net unspent appreciation on investments with donor restrictions is accounted for as net assets with donor restrictions and together with unspent appreciation on unrestricted endowment funds is not available for distribution, except by the express appropriation action of the board of trustees.”
“The society is exempt from federal income tax under section 501(c )(3) of the internal revenue code. The society is also exempt from massachusetts income taxes. However, income from certain activities not directly related to the society's tax-exempt purpose may be subject to taxation as unrelated business income at both the state and federal levels. In addition, the society qualifies for the charitable contribution deduction under section 170(b)(1)(a) and had been classified as an organization other than private foundation under section 509(a)(2). The society evaluates all significant tax positions. As of june 30, 2024, the society does not believe that it has taken any tax positions that would require the recording of any additional tax liability nor does it believe that there are any unrealized tax benefits that would either increase or decrease within the next 12 months. The society's income tax returns are subject to examination by the appropriate taxing jurisdictions; however, there are no examinations in process.”
“Purchase of collections -66,016.”
“Reclass of rental expenses -8,074. Reclass of fundraising expenses -159,432.”
“Reclass of rental expense 8,074. Reclass of fundraising expenses 159,432.”
“Purchase of collections 66,016.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 833909 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 1132454 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 41000 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 12537 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | THE MHS SEEKS TO MAKE AMERICAN HISTORY RELEVANT AND ACCESSIBLE TO ANYONE. |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 3718 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 3718 |
| IRS990/AllOtherContributionsAmt | 0 | 2977782 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 30577 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 48291 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 78868 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | BRENDA M LAWSON |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6176460520 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 1154 BOYLSTON STREET |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | BOSTON |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02215 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 386891 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 861654 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 3 |
| IRS990/CollectionsOfArtInd | 0 | 1 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 346259 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 346259 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 3726 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 3726 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 137211 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 106191 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 100670 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 125 ROCKY BROOK ROAD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 100 ELMGROVE PART |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 19 HAWTHORNE AVENUE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | NORTH ANDOVER |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | ROCHESTER |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | NEWTON |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | NY |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | MA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 01845 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 14624 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 02466 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | WINTER STREET CFO LLC |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | COMTEC SOLUTIONS LLC |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 2 | SAGE SEARCH PARTNERS LLC |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | CFO CONSULTANT |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | IT SERVICES |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | EXECUTIVE SEARCH FIRM |
| IRS990/ContriRptFundraisingEventAmt | 0 | 393614 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 3720009 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 148063 |
| IRS990/CYInvestmentIncomeAmt | 0 | 3447410 |
| IRS990/CYOtherExpensesAmt | 0 | 3911236 |
| IRS990/CYOtherRevenueAmt | 0 | -59813 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 42834 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -3398205 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 6489346 |
| IRS990/CYTotalExpensesAmt | 0 | 10548645 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 1071357 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 7150440 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 1 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 335067 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 328699 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 1 |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 80906 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 79067 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 332820 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 492793 |
| IRS990/Desc | 0 | AS THE NATIONS' FIRST HISTORICAL SOCIETY, THE MASSACHUSETTS HISTORICAL SOCIETY (MHS) STRIVES TO ENHANCE THE UNDERSTANDING OF OUR NATION'S PAST AND ITS CONNECTION TO THE PRESENT, DEMONSTRATING THAT HISTORY IS NOT JUST A SERIES OF EVENTS THAT HAPPENED TO INDIVIDUALS LONG AGO BUT IS INTEGRAL TO THE FABRIC OF OUR DAILY LIVES. ITS COLLECTIONS ARE ACCESSIBLE TO ANYONE WITH AN INTEREST IN AMERICAN HISTORY. BEYOND RESEARCH, THE MHS OFFERS MANY WAYS FOR THE PUBLIC TO ENJOY ITS COLLECTIONS INCLUDING ENGAGING PROGRAMS, THOUGHT-PROVOKING EXHIBITIONS, PUBLICATIONS, SEMINARS, AND TEACHER WORKSHOPS.PLEASE SEE SCH. O FOR ADDITIONAL PROGRAM HIGHLIGHTS & DESCRIPTIONS.COLLECTIONS - THE SOCIETY'S EXTRAORDINARY COLLECTIONS TELL THE STORY OF AMERICA THROUGH MILLIONS OF RARE AND UNIQUE DOCUMENTS, ARTIFACTS, AND NATIONAL TREASURES, INCLUDING THE PERSONAL PAPERS OF THREE PRESIDENTS JOHN ADAMS, JOHN QUINCY ADAMS, AND THOMAS JEFFERSON. THROUGH ITS RESEARCH LIBRARY, ONLINE RESOURCES, PUBLICATIONS, EXHIBITIONS, AND PROGRAMS, THE MHS MAKES ITS HOLDINGS ACCESSIBLE TO ANYONE WITH AN INTEREST IN THE PEOPLE AND EVENTS THAT SHAPED OUR COUNTRY. PAUL REVERE'S HANDWRITTEN ACCOUNT OF HIS FAMOUS RIDE, THOMAS JEFFERSON'S AND JOHN ADAM'S MANUSCRIPT COPIES OF THE DECLARATION OF INDEPENDENCE AND ELBRIDGE GERRY'S ANNOTATED COPY OF THE CONSTITUTION ARE AMONG THE MANY ICONIC AMERICAN DOCUMENTS OF THE MHS. SPANNING FOUR CENTURIES, THE LETTERS, DIARIES, AND OTHER PERSONAL PAPERS OF INDIVIDUALS AND FAMILIES, AS WELL AS THEIR BOOKS, PHOTOGRAPHS, MAPS, NEWSPAPERS, ARTIFACTS, AND WORKS OF ART HAVE BECOME ESSENTIAL PRIMARY SOURCES FOR THE STUDY AND UNDERSTANDING OF AMERICAN HISTORY. THE LIBRARY IS FREE AND OPEN TO RESEARCHERS OF ALL AGES AND LEVELS OF INTEREST. THE LIBRARY DOES NOT LEND MATERIALS, BUT ANY PERSON INTERESTED IN USING THE COLLECTION CAN REGISTER AS A RESEARCHER AND USE MATERIALS IN THE LIBRARY. IN MANY CASES, SELECTED MATERIALS CAN BE REPRODUCED AND SENT TO INDIVIDUALS WHO CANNOT VISIT THE LIBRARY IN PERSON.EXHIBITIONS - THE SOCIETY'S EXHIBITIONS CELEBRATE THE PERSPECTIVE AMERICAN HISTORY BRINGS TO OUR OWN TIME AND ILLUSTRATE HOW IT SUSTAINS OUR REPUBLIC AND GUIDES OUR FUTURE. AS A MAJOR HISTORY PRESENTATION VENUE FOR THE REGION, THE MHS PRODUCES EXHIBITIONS THAT ARE THEMATIC, TELL STORIES, AND EXPLORE HOW TURNING POINTS IN THE PAST ARE REFLECTED IN CULTURE TODAY. THROUGHOUT FISCAL YEAR 2024, VISITORS TO OUR BUILDING WERE ABLE TO ENJOY TWO EXHIBITIONS. IN COMMEMORATION OF THE 250TH ANNIVERSARY OF THE BOSTON TEA PARTY, THE MHS DISPLAYED THE EXHIBITION "THE DYE IS CAST": INTERESTS & IDEALS THAT MOTIVATED THE BOSTON TEA PARTY FROM OCTOBER 5, 2023, TO FEBRUARY 29, 2024. THIS EXHIBITION DELVED INTO A PIVOTAL MOMENT IN AMERICAN HISTORYTHE BOSTON TEA PARTYTHROUGH THE PERSPECTIVES OF SIX INDIVIDUALS AND FEATURED A REMARKABLE COLLECTION OF ARTIFACTS AND DOCUMENTS FROM THE MHS COLLECTION. MORE THAN 700 PEOPLE VISITED THE MHS JUST TO SEE THE EXHIBITION AS WELL AS MANY MORE WHO VIEWED IT AS PART OF OTHER PROGRAMMING.BOSTON VIEWS: THROUGH THE LENS OF ARTHUR A. SHURCLIFF WAS ON DISPLAY FROM MAY 6, 2024, TO FEBRUARY 28, 2025. ARTHUR ASAHEL SHURCLIFF (18701957), A LANDSCAPE ARCHITECT, CREATED A COLLECTION OF 1,295 GLASS LANTERN SLIDES THAT DEPICT CITYSCAPES AND BUILDINGS IN BOSTON DURING THE FIRST DECADES OF THE 20TH CENTURY, AND MUCH MORE. IN ADDITION TO VIEWS OF BOSTON REPRODUCED IN THE EXHIBITION, THE MHS DISPLAYED SLIDES OF HISTORICAL MAPS AND PAINTINGS, PLANS AND DRAWINGS CREATED BY SHURCLIFF TO ILLUSTRATE URBAN GROWTH AND LAND USE, AND EARLY AERIAL PHOTOGRAPHS OF BOSTON AND OTHER CITIES. THROUGHOUT THE RUN OF THE SHOW, THE MHS WELCOMED MORE THAN 1,310 EXHIBITION VISITORS ALONG WITH THOSE WHO VIEWED IT AS PART OF OTHER PROGRAMMING. EDUCATION AND PUBLIC PROGRAMS - CONTINUING TO DEVELOP A VIBRANT SELECTION OF PUBLIC AND EDUCATIONAL PROGRAMS ENABLES THE MHS TO HELP ENHANCE THE UNDERSTANDING OF OUR NATION'S PAST AND ITS CONNECTION TO THE PRESENT. FISCAL YEAR 2024 WAS THE FIRST YEA |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 87570098 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 92064428 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 1 |
| IRS990/ElectionOfBoardMembersInd | 0 | 1 |
| IRS990/EmployeeCnt | 0 | 89 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 6135348 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 32498 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 32498 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 89735 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 89735 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 34684 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 428632 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 48594 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 511910 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 1134129 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 1134129 |
| IRS990/ForeignActivitiesInd | 0 | 1 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 35.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 35.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 35.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 35.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 35.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 35.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 35.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 35.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 18 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 19 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 20 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 21 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 22 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 23 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 24 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 25 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 26 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 27 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 28 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 29 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 30 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 31 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 32 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 33 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 34 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 35 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 0 | MELINDA BARBER |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 1 | ELIZABETH A CHANG |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 2 | MICHAEL A EWALD |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 3 | ANNETTE GORDON-REED |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 4 | SUSAN W HUNNEWELL |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 5 | G NATHANIEL JEPPSON |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 6 | RENE JONES |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 7 | ROBERT KWAK |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 8 | ANTHONY H LENESS |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 9 | ANNE CRAIGE MCNAY |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 10 | JOHN O'LEARY |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 11 | ROBERT G RIPLEY JR |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 12 | PAUL W SANDMAN |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 13 | CATHERINE BABSON JR |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 14 | JAMES SEGEL |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 15 | JUDITH BRYANT WITTENBERG |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 16 | GREGORY GROOVER |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 17 | RICHARD PIERSON |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 18 | HILLARY RAYPORT |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 19 | ANDREW SERWER |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 20 | CHRISTOPHER TOOMEY |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 21 | ALEXANDER WHITTEMORE |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 13 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 14 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 15 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 16 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 17 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 18 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 19 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 20 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 21 | X |
| IRS990/Form990PartVIISectionAGrp/KeyEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/KeyEmployeeInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 34191 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 28487 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 32253 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 43443 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 13291 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 17320 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 14424 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 34873 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 22 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 24 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 25 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 26 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 27 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 28 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 29 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 30 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 31 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 32 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 33 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 34 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 35 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | CATHERINE ALLGOR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | AMANDA H CLARK MACMULLAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | BRENDA M LAWSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | VICTORIA MCKAY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | PETER DRUMMEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | KANISORN WONGSRICHANALAI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | SARA MARTIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | CAROL W KNAUFF |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | NEWCOMB STILLWELL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | BENJAMIN C ADAMS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | OLIVER F AMES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | EDWARD BALDINI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | LEVIN H CAMPBELL JR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | G MARSHALL MORIARTY |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 300763 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 176654 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 169944 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 120620 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 144286 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 124847 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 126903 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 102806 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 22 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 24 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 25 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 26 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 27 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 28 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 29 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 30 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 31 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 32 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 33 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 34 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 35 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 22 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 24 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 25 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 26 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 27 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 28 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 29 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 30 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 31 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 32 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 33 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 34 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 35 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | SENIOR VP FOR PROGRAMS & EXTERNAL AFFAIRS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | SENIOR VP OF COLLECTIONS & CONTENT DEVELOPMENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | DIRECTOR OF DEVELOPMENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | CHIEF HISTORIAN & LIBRARIAN |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | DIRECTOR OF RESEARCH |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | EDITOR IN CHIEF |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | VP FO PROGRAMS & EXTERNAL AFFAIRS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 23 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 24 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 25 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 26 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 27 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 28 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 29 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 30 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 31 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 32 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 33 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 34 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 35 | CHAIR OF ADVISORS |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/Form990TFiledInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1791 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 1 |
| IRS990/FundraisingAmt | 0 | 393614 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 159432 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 31044 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 3280091 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 25 |
| IRS990/GovernmentGrantsAmt | 0 | 348613 |
| IRS990/GrantAmt | 0 | 148063 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 148063 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 148063 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 6681043 |
| IRS990/GrossReceiptsAmt | 0 | 10718898 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 6668 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 25 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 9 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 51655 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 49794 |
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