Liabilities / Assets
18th percentile
Higher debt load relative to assets than 18% of similar nonprofits.
EIN 04-2103652 • 501(c)3 • Worcester, MA
Profile
Supports and maintains a research library of american history and culture. The american antiquarian society cultivates a deeper understanding of the american past, grounded in its ever-growing collection of printed and manuscript sources. As a national research library, aas collects, preserves, and makes available for study the record of what is now the united states from early european settlement through 1900. As a learned society, aas fosters a broad community of inquiry through inclusive programs and generous support for scholarship. Our audiences include professional scholars, pre-collegiate, undergraduate, and graduate students and educators, professional artists and writers, genealogists, and the general public.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
18th percentile
Higher debt load relative to assets than 18% of similar nonprofits.
Liabilities / Revenue
58th percentile
Higher debt load relative to revenue than 58% of similar nonprofits.
Net Margin
48th percentile
Higher net margin than 48% of similar nonprofits.
Top Officer Pay
23rd percentile
Higher top officer pay than 23% of similar nonprofits.
Top officer pay equals 3.8% of source-year revenue.
Asset Growth
35th percentile
Faster asset growth than 35% of similar nonprofits.
Revenue Growth
76th percentile
Faster revenue growth than 76% of similar nonprofits.
Assets
Up$120,286,066
Up $3,133,613 (+2.7%) from 2024
Liabilities
Down$4,231,342
Down $526,635 (-11%) from 2024
Net Assets
Up$116,054,724
Up $3,660,248 (+3.3%) from 2024
Revenue
Up$7,798,791
Up $1,428,545 (+22%) from 2024
Expenses
Up$7,491,789
Up $303,121 (+4.2%) from 2024
Net Income
Up$307,002
Up $1,125,424 (+138%) from 2024
Most recent year
2025 • Form 990Detailed filing. Detailed filing data is available for this year.
Supports and maintains a research library of american history and culture. The american antiquarian society cultivates a deeper understanding of the american past, grounded in its ever-growing collection of printed and manuscript sources. As a national research library, aas collects, preserves, and makes available for study the record of what is now the united states from early european settlement through 1900. As a learned society, aas fosters a broad community of inquiry through inclusive programs and generous support for scholarship. Our audiences include professional scholars, pre-collegiate, undergraduate, and graduate students and educators, professional artists and writers, genealogists, and the general public.
The american antiquarian society cultivates a deeper understanding of the american past, grounded in its ever-growing collection of printed and manuscript sources. As a national research library, aas collects, preserves, and makes available for study the record of what is now the united states from early european settlement through 1900. As a learned society, aas fosters a broad community of inquiry through inclusive programs and generous support for scholarship. Our audiences include professional scholars, pre-collegiate, undergraduate, and graduate students and educators, professional artists and writers, genealogists, and the general public.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $62,225,009 | $70,256,116 | ▲ $8,031,107 |
| Land, Buildings, and Equipment, Net | $28,082,277 | $28,337,094 | ▲ $254,817 |
| Investments Other Securities | $16,466,754 | $12,532,837 | ▼ $3,933,917 |
| Savings and Temporary Cash Investments | $9,045,703 | $8,105,327 | ▼ $940,376 |
| Investments Program Related | $772,245 | $776,564 | ▲ $4,319 |
| Pledges and Grants Receivable | $510,071 | $227,523 | ▼ $282,548 |
| Prepaid Expenses and Deferred Charges | $50,394 | $50,605 | ▲ $211 |
| Total Assets | $117,152,453 | $120,286,066 | ▲ $3,133,613 |
| Liabilities | |||
| Tax Exempt Bond Liabilities | $4,269,508 | $3,993,570 | ▼ $275,938 |
| Accounts Payable and Accrued Expenses | $488,469 | $237,772 | ▼ $250,697 |
| Total Liabilities | $4,757,977 | $4,231,342 | ▼ $526,635 |
| Net Assets / Fund Balance | |||
| Net Assets With Donor Restrictions | $83,010,720 | $86,941,669 | ▲ $3,930,949 |
| Net Assets Without Donor Restrictions | $29,383,756 | $29,113,055 | ▼ $270,701 |
| Total Net Assets Fund Balance | $112,394,476 | $116,054,724 | ▲ $3,660,248 |
| Total Liabilities and Net Assets / Fund Balance | $117,152,453 | $120,286,066 | ▲ $3,133,613 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $28,086,496 | $12,198,049 | $40,284,545 |
| Equipment | $141,040 | $1,406,928 | $1,547,968 |
| Other Land Buildings | $109,558 | - | $109,558 |
| Other Securities | $12,532,837 | - | - |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2024 | $73,983,412 | $184,979 | ▲ $7,239,890 | $3,398,647 | $77,815,984 |
| 2023 | $67,017,054 | $24,050 | ▲ $10,381,380 | $3,314,645 | $73,983,412 |
| 2022 | $61,366,711 | $2,605,500 | ▲ $6,387,620 | $3,133,566 | $67,017,054 |
| 2021 | $76,666,152 | $114,100 | ▼ $12,171,363 | $3,163,713 | $61,366,711 |
| 2020 | $63,828,081 | $25,350 | ▲ $15,975,097 | $3,026,332 | $76,666,152 |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Scott E Casper | President | FT | $267,956 | $25,778 | $293,734 |
| Mary L Swain | VP Advancement | FT | $151,803 | $10,072 | $161,875 |
| Lauren Hewes | VP Collections | FT | $134,378 | $22,263 | $156,641 |
| Nan Wolverton | VP Programs | FT | $139,507 | $16,278 | $155,785 |
| Kristen Balash | VP for Finance and Adminis | FT | $135,573 | $14,170 | $149,743 |
| Andrew Cariglia | Head of Buildings and Grou | FT | $119,204 | $18,906 | $138,110 |
| Name | Title |
|---|---|
| Paul S Sperry | Chair |
| Rosalind Remer | Vice Chair |
| Christine Loker | Councilor |
| Deborah Hall | Councilor |
| Derrick R Spires | Councilor |
| Douglas Brown | Councilor |
| J Christopher Collins | Councilor |
| James Donnelly | Councilor |
| John Herron Jr | Councilor |
| Julian Davis Wade | Councilor |
| Manisha Sinha | Councilor |
| Mark a Peterson | Councilor |
| Meredith Mcgill | Councilor |
| Richard D Brown | Councilor |
| Samantha Mcdonald | Councilor |
| Sharon Block | Councilor |
| Sheryl Jaeger | Councilor |
| Wendy Bellion | Councilor |
| Nick Aretakis | Recording Secretary |
| Craig S Wilder | Secretary for Domestic COR |
| Ann V Fabian | Secretary for Foreign COR |
| George W Tetler Iii | Treasurer |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $3,941,544 |
| Other Expenses | $3,211,177 |
| Total Fundraising Expense | $497,349 |
| Grants and Similar Amounts Paid | $339,068 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $2,332,887 | $471,149 | $219,728 | $3,023,764 |
| Depreciation Depletion | $950,401 | $24,962 | $16,641 | $992,004 |
| Current Officers, Directors, Trustees, and Key Employees | $332,036 | $390,905 | $194,839 | $917,780 |
| Occupancy | $663,819 | $20,876 | $13,805 | $698,500 |
| Grants to Domestic Individuals | $339,068 | - | - | $339,068 |
| Fees for Services Other | $187,679 | $49,263 | $803 | $237,745 |
| Fees for Service Investment Mgmnt Fees | - | $208,101 | - | $208,101 |
| Interest | $151,422 | - | - | $151,422 |
| Insurance | $88,083 | $9,787 | $9,787 | $107,657 |
| Office Expenses | $49,539 | $3,553 | $15,206 | $68,298 |
| Fees for Services Accounting | - | $44,575 | - | $44,575 |
| Other Expenses | $6,076 | $217 | $7,331 | $13,624 |
| All Other Expenses | $840 | $677 | - | $1,517 |
| Fees for Services Legal | - | $325 | - | $325 |
| Total Functional Expenses | $5,746,579 | $1,247,861 | $497,349 | $7,491,789 |
| Line Item | Amount |
|---|---|
| Total Expenses per Form 990 | $7,491,789 |
| Expenses per Audited Statements | $7,283,688 |
| Total Expenses per Audited Statements | $7,283,688 |
| Expenses Not Reported on Financial Statements | $208,101 |
| Expenses Not Reported on Form 990 | $0 |
| Region | Activity | Services | Offices | Employees | Spending |
|---|---|---|---|---|---|
| Central America and Caribbean | Investments | - | 0 | 0 | $12,362,682 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
| Bond | Issuer | Issued | Issue Price | Purpose |
|---|---|---|---|---|
| A | Mass Development Finance Agency | 2017-02-08 | $17,705,600 | Finance capital improvements and refinance existing bonds |
| Bond | Total Proceeds | Spent | Retired | Issuance Costs |
|---|---|---|---|---|
| A | $17,705,600 | $43,493 | - | $137,756 |
“The society changes is bylaws to increase the # of allowed members.”
“A draft of the form 990 is emailed to each officer and council member for review before it is filed.”
“The organization annually reviews information provided by officers, directors/trustees and key employees to insure compliance with the conflict of interest policy.”
“Compensation review for the president: on an annual basis, the executive committee of the council will conduct an evaluation of the president for the purposes of determining her/his compensation. Executive compensation data for institutions designated by the council as comparable to aas will be considered when setting overall compensation. Within thirty days of their evaluation, the executive committee will communicate in writing the results of their evaluation to the president. This communication should contain a statement of the compensation for the president for the next fiscal year. A contemporaneous record of the deliberations of the executive committee and of the council as they relate to the evaluation of the president will be made and retained. To support the council's evaluation, the president will provide various documents according to a schedule established by the executive committee including: a self-assessment narrative, progress reports on goals and objectives, budget vs. Actual financial reports, reports on fundraising and earned revenues, data on management effectiveness, such as staff turnover and, periodically, job satisfaction surveys, reports from outside evaluators that may be received in the course of grant reviews and financial or regulatory audits. The president determines the salaries of the other officers of the society.”
“Any requests for the organization's documents, policies, financial statements or returns are forwarded to the president of the society who makes arrangements for the release of information. The organization's tax returns are also listed on others' websites.”
“As allowed by accounting principles generally accepted in the united states of america and following the practices of many libraries and museums, the society has not capitalized its collection of items of historical nature and other related objects purchased or donated. The collection is held for public education or research in furtherance of public service rather than financial gain. The society continually reviews its collection and may sell or acquire additional items. Expenditures for additional collection items are presented as a reduction in the appropriate class of net assets.”
“The collections of the aas include printed materials of what is now the united states of america from the first european settlement through the year 1900. The mission of aas is to collect, preserve and make available for study these printed records.”
“The society's endowment consists of individual donor-restricted funds established for a variety of purposes. Its endowment includes both donor-restricted endowment funds and funds designated by the society to function as endowments. As required by generally accepted accounting principles, net assets associated with endowment funds are classified and reported based on the existence or absence of donor-imposed or legal restrictions. As required by generally accepted accounting principles, the society classifies as donor-restricted net assets (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 gift instrument at the time the accumulation is added to the fund. The remaining portion of the donor-restricted endowment fund that is not classified as non-expendable net assets is classified as expendable net assets until those amounts are appropriated for expenditure by the society in a manner consistent with the standard of prudence prescribed by state law. In accordance with the uniform prudent management of institutional funds act, the society may consider the following factors in making a determination to appropriate or accumulate donor-restricted endowment funds: the duration and preservation of the fund; the purposes of the society and the donor-restricted endowment fund; general economic conditions; the possible effect of inflation and deflation; the expected total return from income and the appreciation of investments; other resources of the society; and the investment policies of the society. The society has adopted investment and spending policies for its council-designated and other endowment assets that attempt to provide a predictable stream of funding for its programs while seeking to maintain the purchasing power of the endowment assets. Under this policy, as approved by the council, the endowment assets are invested in a manner that is intended to produce results that exceed the price and yield results of the s&p 500 index while assuming a moderate level of investment risk. The society expects its endowment funds, over time, to produce an average rate of return of approximately 8% annually. Actual returns in any given year may vary from this amount. To satisfy its long-term rate-of-return objectives, the society relies on a total return strategy in which investment returns are achieved through both capital appreciation (realized and unrealized) and current yield (interest and dividends). The society has invested in a portfolio that targets a diversified asset allocation that places a greater emphasis on equity-based investments to achieve its long-term return objectives within prudent risk constraints. The society has a policy of appropriating for distribution each year 5% of its endowment fund's average fair value over the prior twelve quarters through may 31 of the year preceding the year in which the distribution is planned. In establishing this policy, the society considered the long-term expected return on its endowment. This is consistent with the society's objective to maintain the purchasing power of its endowment. From time to time, the fair value of assets associated with individual donor-restricted endowment funds may fall below the level that the donor imposed restrictions require the society to retain as a fund of perpetual duration. There were no deficiencies as of august 31, 2025 and 2024.”
“The society is exempt from federal income taxation under section 501(c)(3) of the internal revenue code (irc), though it would be subject to tax on income unrelated to its exempt purposes (unless that income is otherwise excluded by the irc). Contributions to the society are tax deductible to donors under section 170 of the irc. The society is not classified as a private foundation.”
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 | 488469 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 237772 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | THE AMERICAN ANTIQUARIAN SOCIETY CULTIVATES A DEEPER UNDERSTANDING OF THE AMERICAN PAST, GROUNDED IN ITS EVER-GROWING COLLECTION OF PRINTED AND MANUSCRIPT SOURCES. AS A NATIONAL RESEARCH LIBRARY, AAS COLLECTS, PRESERVES, AND MAKES AVAILABLE FOR STUDY THE RECORD OF WHAT IS NOW THE UNITED STATES FROM EARLY EUROPEAN SETTLEMENT THROUGH 1900. AS A LEARNED SOCIETY, AAS FOSTERS A BROAD COMMUNITY OF INQUIRY THROUGH INCLUSIVE PROGRAMS AND GENEROUS SUPPORT FOR SCHOLARSHIP. OUR AUDIENCES INCLUDE PROFESSIONAL SCHOLARS, PRE-COLLEGIATE, UNDERGRADUATE, AND GRADUATE STUDENTS AND EDUCATORS, PROFESSIONAL ARTISTS AND WRITERS, GENEALOGISTS, AND THE GENERAL PUBLIC. |
| IRS990/AllOtherContributionsAmt | 0 | 1858998 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 677 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 840 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 1517 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | GEORGE TETLER |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 5084712167 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 185 SALISBURY STREET |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | WORCESTER |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 01609 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 1 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 1 |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 194839 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 390905 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 332036 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 917780 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 1858998 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 339068 |
| IRS990/CYInvestmentIncomeAmt | 0 | 5106544 |
| IRS990/CYOtherExpensesAmt | 0 | 3211177 |
| IRS990/CYOtherRevenueAmt | 0 | 9308 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 823941 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 307002 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 3941544 |
| IRS990/CYTotalExpensesAmt | 0 | 7491789 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 497349 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 7798791 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 1 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 16641 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 24962 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 950401 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 992004 |
| IRS990/Desc | 0 | COLLECTION PURCHASES - TO INCREASE COLLECTION OF PRINTED MATERIALS RELATING TO AMERICAN HISTORY PRIOR TO 1900. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 83010720 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 86941669 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 1 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 57 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/EscrowAccountInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 441701 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditPerformedInd | 0 | 1 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 1 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 44575 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 44575 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 325 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 325 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 803 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 49263 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 187679 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 237745 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 208101 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 208101 |
| 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 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 18 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 19 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 20 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 21 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 22 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 23 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 24 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 25 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 26 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 27 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 13 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 14 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 15 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 16 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 17 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 18 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 19 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 20 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 21 | 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/OfficerInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 25778 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 14170 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 22263 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 10072 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 16278 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 18906 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| 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/PersonNm | 0 | SCOTT E CASPER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | KRISTEN BALASH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | LAUREN HEWES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | MARY L SWAIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | NAN WOLVERTON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | ANDREW CARIGLIA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | PAUL S SPERRY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | ROSALIND REMER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | GEORGE W TETLER III |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | NICK ARETAKIS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | CRAIG S WILDER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | ANN V FABIAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | CHRISTINE LOKER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | DEBORAH HALL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | DERRICK R SPIRES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | DOUGLAS BROWN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | J CHRISTOPHER COLLINS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | JAMES DONNELLY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | JOHN HERRON JR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | JULIAN DAVIS WADE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | MEREDITH MCGILL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | SAMANTHA MCDONALD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 22 | MANISHA SINHA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 23 | MARK A PETERSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 24 | RICHARD D BROWN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 25 | SHARON BLOCK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 26 | SHERYL JAEGER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 27 | WENDY BELLION |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 267956 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 135573 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 134378 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 151803 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 139507 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 119204 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| 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/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/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | VP FOR FINANCE AND ADMINIS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | VP COLLECTIONS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | VP ADVANCEMENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | VP PROGRAMS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | HEAD OF BUILDINGS AND GROU |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | RECORDING SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | SECRETARY FOR DOMESTIC COR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | SECRETARY FOR FOREIGN COR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 23 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 24 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 25 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 26 | COUNCILOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 27 | COUNCILOR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/Form990TFiledInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1812 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 2710699 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 23 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 339068 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 339068 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 10812442 |
| IRS990/GrossReceiptsAmt | 0 | 15900534 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 22 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 6 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 9787 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 9787 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 88083 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 107657 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 151422 |
| IRS990/InterestGrp/TotalAmt | 0 | 151422 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 2395845 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 2395845 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 16466754 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 12532837 |
| IRS990/InvestmentsProgramRelatedGrp/BOYAmt | 0 | 772245 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 776564 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 62225009 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 70256116 |
| IRS990/InvestTaxExemptBondsInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 73 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 13604977 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 28082277 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 28337094 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 41942071 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 8101743 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | SUPPORTS AND MAINTAINS A RESEARCH LIBRARY OF AMERICAN HISTORY AND CULTURE. THE AMERICAN ANTIQUARIAN SOCIETY CULTIVATES A DEEPER UNDERSTANDING OF THE AMERICAN PAST, GROUNDED IN ITS EVER-GROWING COLLECTION OF PRINTED AND MANUSCRIPT SOURCES. AS A NATIONAL RESEARCH LIBRARY, AAS COLLECTS, PRESERVES, AND MAKES AVAILABLE FOR STUDY THE RECORD OF WHAT IS NOW THE UNITED STATES FROM EARLY EUROPEAN SETTLEMENT THROUGH 1900. AS A LEARNED SOCIETY, AAS FOSTERS A BROAD COMMUNITY OF INQUIRY THROUGH INCLUSIVE PROGRAMS AND GENEROUS SUPPORT FOR SCHOLARSHIP. OUR AUDIENCES INCLUDE PROFESSIONAL SCHOLARS, PRE-COLLEGIATE, UNDERGRADUATE, AND GRADUATE STUDENTS AND EDUCATORS, PROFESSIONAL ARTISTS AND WRITERS, GENEALOGISTS, AND THE GENERAL PUBLIC. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 112394476 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 116054724 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 2710699 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 2710699 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 3353246 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 29383756 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 29113055 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 13805 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 20876 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 663819 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 698500 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 15206 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 3553 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 49539 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 68298 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OnBehalfOfIssuerInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | COLLECTION PURCHASES |
| IRS990/OtherExpensesGrp/Desc | 1 | COMPUTER OPERATIONS |
| IRS990/OtherExpensesGrp/Desc | 2 | PROGRAMS & EVENTS |
| IRS990/OtherExpensesGrp/Desc | 3 | PRINTING |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 17228 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 1981 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 2 | 7331 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 17303 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 6168 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 217 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 441701 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 158169 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 44859 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 6076 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 441701 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 192700 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 53008 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 13624 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 1 | 900099 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | MISC INCOME |
| IRS990/OtherRevenueMiscGrp/Desc | 1 | COLLECTION SALES |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 7688 |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 1 | 1620 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 7688 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 1 | 1620 |
| IRS990/OtherRevenueTotalAmt | 0 | 9308 |
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