Liabilities / Assets
27th percentile
Higher debt load relative to assets than 27% of similar nonprofits.
Wellesley Historical Society Inc
EIN 04-2312840 • 501(c)3 • Wellesley, MA
Profile
To serve as the historical resource center for the town of wellesley; to provide educational programs; to collect, interpret and display materials pertaining to the history of the town and its people; to inspire public involvement in and appreciation of its heritage and culture.
Siviq Scores
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
0.00x
Liabilities / Revenue
33rd percentile
Higher debt load relative to revenue than 33% of similar nonprofits.
Net Margin
90th percentile
Higher net margin than 90% of similar nonprofits.
Top Officer Pay
52nd percentile
Higher top officer pay than 52% of similar nonprofits.
Top officer pay equals 15.7% of source-year revenue.
Asset Growth
73rd percentile
Faster asset growth than 73% of similar nonprofits.
Revenue Growth
90th percentile
Faster revenue growth than 90% of similar nonprofits.
Balance Sheet
Assets
Up$1,678,848
Up $206,867 (+14%) from 2023
Liabilities
Up$6,934
Up $360 (+5.5%) from 2023
Net Assets
Up$1,671,914
Up $206,507 (+14%) from 2023
Revenue
Up$399,217
Up $189,256 (+90%) from 2023
Expenses
Up$194,046
Up $36,901 (+23%) from 2023
Net Income
Up$205,171
Up $152,355 (+288%) from 2023
Trend Graphs
Filings
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
- Assets
- $1,678,848
- Liabilities
- $6,934
- Net assets
- $1,671,914
- Revenue
- $399,217
- Expenses
- $194,046
- Net income
- $205,171
Latest Filing Detail
Jump To
Filing Snapshot
- Filing Period
- Jul 1, 2023 to Jun 30, 2024
- Signed
- May 15, 2025
- Return Version
- 2023v6.0
- Gross Receipts
- $464,423
Mission and Program Overview
Mission
To serve as the historical resource center for the town of wellesley; to provide educational programs; to collect, interpret and display materials pertaining to the history of the town and its people; to inspire public involvement in and appreciation of its heritage and culture.
Balance Sheet Detail
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Land, Buildings, and Equipment, Net | $1,223,503 | $1,196,828 | ▼ $26,675 |
| Investments in Publicly Traded Securities | - | $141,868 | - |
| Cash and Non-Interest-Bearing Accounts | $56,002 | $87,352 | ▲ $31,350 |
| Prepaid Expenses and Deferred Charges | - | $5,302 | - |
| Savings and Temporary Cash Investments | $176,246 | $4,445 | ▼ $171,801 |
| Total Assets | $1,471,981 | $1,678,848 | ▲ $206,867 |
| Other Assets Total | $16,230 | $243,053 | ▲ $226,823 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $6,574 | $6,934 | ▲ $360 |
| Total Liabilities | $6,574 | $6,934 | ▲ $360 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $1,427,807 | $1,634,314 | ▲ $206,507 |
| Net Assets With Donor Restrictions | $37,600 | $37,600 | → $0 |
| Total Net Assets Fund Balance | $1,465,407 | $1,671,914 | ▲ $206,507 |
| Total Liabilities and Net Assets / Fund Balance | $1,471,981 | $1,678,848 | ▲ $206,867 |
Asset Categories
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $556,157 | $182,310 | $738,467 |
| Land | $422,750 | - | $422,750 |
| Leasehold Improvements | $212,688 | $36,135 | $248,823 |
| Equipment | $5,233 | $22,955 | $28,188 |
| Other Assets Org | $243,053 | - | - |
Compensation and Service Providers
Employees
| Name | Title | Full / Part Time | Base | Total |
|---|---|---|---|---|
| Taylor Kalloch | Executive Director | FT | $62,500 | $62,500 |
Board Members and Trustees
| Name | Title |
|---|---|
| Peter Mongeau | President |
| Frederick Wright | Vice President |
| Geoff Moorhear | Director |
| Hapet Berberian | Director |
| Jonathan Page | Director |
| Lorri Seibert Woodacre | Director |
| Michael Racette | Director |
| Stephen Pfaff | Director |
| Tom Paine | Director |
| Vincent Mayer | Director |
| Barbara Searle | Secretary |
| Bill Mordan | Treasurer |
Revenue and Support
Revenue Composition
- Contributions and Grants
- $269,055
- Program Service Revenue
- $0
- Investment Income
- $10,289
- Other Revenue
- $119,873
- All Other Contributions
- $204,935
- Change in Net Assets
- $205,171
Expenses and Functional Allocation
Major Expense Lines
| Line Item | Amount |
|---|---|
| Other Expenses | $123,508 |
| Salaries, Compensation, and Employee Benefits | $70,538 |
| Total Fundraising Expense | $24,688 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
Functional Expense Allocation
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Current Officers, Directors, Trustees, and Key Employees | $22,817 | $19,558 | $22,817 | $65,192 |
| Office Expenses | - | $36,732 | - | $36,732 |
| Occupancy | - | $27,895 | - | $27,895 |
| Depreciation Depletion | - | $26,675 | - | $26,675 |
| Payroll Taxes | $1,871 | $1,604 | $1,871 | $5,346 |
| Insurance | - | $4,715 | - | $4,715 |
| Fees for Services Accounting | - | $4,710 | - | $4,710 |
| Other Expenses | $5,000 | $2,776 | - | $2,776 |
| Advertising | - | $737 | - | $737 |
| All Other Expenses | $198 | $464 | - | $662 |
| Total Functional Expenses | $40,592 | $128,766 | $24,688 | $194,046 |
Fundraising, Events, and Gaming
- Fundraising activities
- Yes
- Gaming activities
- No
- Professional fundraiser used
- Yes
Fundraising and Gaming Totals
| Line Item | Amount |
|---|---|
| Fundraising Gross Income | $185,079 |
| Fundraising Direct Expenses | $65,206 |
| Professional Fundraising Fees | $0 |
Fundraising Events
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| Spring Gala | $81,610 | $81,610 | $46,303 | $35,307 |
| Annual Appeal | $51,939 | $51,939 | $0 | $51,939 |
| Total Events | $185,079 | $185,079 | $65,206 | $119,873 |
Political and Lobbying Activity
- Political campaign activity
- No
- Lobbying activity
- No
- Subject to proxy tax
- No
Governance and Compliance
Governance Checklist
- Compiled or reviewed by an accountant
- No
- Backup withholding compliance
- Yes
- Business relationship with 35% controlled entity
- No
- Business relationship with family members
- No
- Business relationship with organization members
- No
- Material changes to governing documents
- No
- Compensation from other sources disclosed
- No
- CEO compensation reviewed
- Yes
- Other officer compensation reviewed
- No
- Conflict-of-interest policy
- No
- Audited financial statements prepared
- No
- Key decisions subject to board approval
- No
- Management duties delegated
- No
Governance Explanations
Form 990, Part VI, Section A, Line 6
“The organization has members”
Form 990, Part VI, Section A, Line 7A
“Members have the power to elect other members to the governing body.”
Form 990, Part VI, Section B, Line 11B
“The form 990 is e-mailed to all board members for their review before filing.”
Form 990, Part VI, Section B, Line 15A
“An executive board meeting is held to independently discuss employment package for the organization's employees. Salary was approved after discussion and comparison with other employees at similar organizations.”
Form 990, Part VI, Section C, Line 19
“Available to the public upon request”
Filing and Contact Details
Filer
- Filer Name
- Wellesley Historical Society Inc
- EIN
- 04-2312840
- Phone
- 7812356690
- Address
- 229 WASHINGTON STREET, WELLESLEY, MA 02481
Signing Officer
- Name
- Peter Mongeau
- Title
- President
- Phone
- 7812356690
- Signed
- 2025-05-15
- Discuss with paid preparer
- Yes
Organization Details
- Principal Officer
- Peter Mongeau
- Formed
- 1965
- Legal Domicile
- Ma
- Voting Board Members
- 12
- Independent Board Members
- 12
- Employees
- 1
- Volunteers
- 0
Preparer
- Firm
- Spinelli CPA Pc
- Address
- 146 WEST BOYLSTON DRIVE SUITE 302, WORCESTER, MA 01606
- Preparer
- Karen Spinelli
- Phone
- 5083656522
Supplemental Narrative
Additional Explanations
FORM 990, PART XII, LINE 2C:
“No changes from prior year.”
Financial Statement Notes
PART III, LINE 1A:
“The organization's collections consist of a library of over 33,500 photographs, slides and similar materials relating to the town of wellesley. As part of this library, the organization maintains a complete set of local newspaper editions and historic town records. The organization also holds over 9,700 artifacts, including furniture, fine arts, commemorative items and period costumes along wtih general collections. The organization holds several special collections including civil war library, a lace and embroidery collections and natural history specimens which were collected by local resident families. The organizations collections are for use in public exhibitions both in their museum and on loan. They are also used for educational program development and historic research.”
PART III, LINE 4:
“The organization's collections consist of a library of over 33,500 photographs, slides and similar materials relating to the town of wellesley. As part of this library, the organization maintains a complete set of local newspaper editions and historic town records. The organization also holds over 9,700 artifacts, including furniture, fine arts, commemorative items and period costumes along wtih general collections. The organization holds several special collections including civil war library, a lace and embroidery collections and natural history specimens which were collected by local resident families. The organizations collections are for use in public exhibitions both in their museum and on loan. They are also used for educational program development and historic research.”
PART X, LINE 2:
“There are no unrecognized tax benefits and tax returns remain subject to examination by major tax jurisdictions for the standard three year statute of limitations.”
Raw XML AppendixShowing 400 of 487 raw XML fields
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
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| IRS990/Desc | 0 | TO CONTINUE THE PROCESS TO ARCHIVE OVER 33,500 PHOTOGRAPHS, SLIDES AND SIMILAR MATERIALS AND HOLD OVER 9,700 ARTIFACTS SUCH AS FURNITURE, ART, COMMEMORATIVE ITEMS, PERIOD COSTUMES, MAPS, PLANS, CIVIL WAR LIBRARY, LACE EMBROIDERY COLLECTIONS AND NATURAL HISTORY SPECIMENS. ANSWER RESEARCH INQUIRIES, PROVIDE EXHIBITS, LECTURES AND WALKING TOURS. PROVIDE SCHOLARSHIPS TO LOCAL STUDENTS NEEDING ASSISTANCE TO PURSUE A COLLEGE EDUCATION. PROVIDE UNPAID INTERNSHIP POSITIONS TO INDIVIDUALS WHO HELPED PREPARE THE ORGANIZATION'S EDUCATION PROGRAMS AND ASSIST WITH THE COLLECTIONS PROJECTS. |
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| IRS990/InsuranceGrp/TotalAmt | 0 | 4715 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 9224 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 9224 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 141868 |
| IRS990/IRPDocumentCnt | 0 | 6 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 241400 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 1223503 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 1196828 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 1438228 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 0 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembershipDuesAmt | 0 | 64120 |
| IRS990/MembersOrStockholdersInd | 0 | 1 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | TO SERVE AS THE HISTORICAL RESOURCE CENTER FOR THE TOWN OF WELLESLEY; TO PROVIDE EDUCATIONAL PROGRAMS; TO COLLECT, INTERPRET AND DISPLAY MATERIALS PERTAINING TO THE HISTORY OF THE TOWN AND ITS PEOPLE; TO INSPIRE PUBLIC INVOLVEMENT IN AND APPRECIATION OF ITS HERITAGE AND CULTURE. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 1465407 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1671914 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 1065 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 1065 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | 119873 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 119873 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 1336 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 1427807 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 1634314 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 27895 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 27895 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 36732 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 36732 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 16230 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 243053 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | WORKSHOP AND FEES |
| IRS990/OtherExpensesGrp/Desc | 1 | SCHOLARSHIP AND INTERNS |
| IRS990/OtherExpensesGrp/Desc | 2 | DUES AND SUBSCRIPTIONS |
| IRS990/OtherExpensesGrp/Desc | 3 | TAXES AND LICENSES |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 2900 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 2776 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 10706 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 5000 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 10706 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 5000 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 2900 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 2776 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 1871 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 1604 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 1871 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 5346 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 5302 |
| IRS990/PrincipalOfficerNm | 0 | PETER MONGEAU |
| IRS990/ProfessionalFundraisingInd | 0 | 1 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 106536 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 8045 |
| IRS990/PYOtherExpensesAmt | 0 | 93068 |
| IRS990/PYOtherRevenueAmt | 0 | 95380 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 52816 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 64077 |
| IRS990/PYTotalExpensesAmt | 0 | 157145 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 209961 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 205171 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 1 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 176246 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 4445 |
| IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearAmt | 0 | 269055 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus1YearAmt | 0 | 106536 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 76107 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 495182 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 20896 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/TotalAmt | 0 | 967776 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearAmt | 0 | 10289 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus1YearAmt | 0 | 8045 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 13441 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 51944 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 12709 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/TotalAmt | 0 | 96428 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearAmt | 0 | 185079 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus1YearAmt | 0 | 139668 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus2YearsAmt | 0 | 103195 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus3YearsAmt | 0 | 63621 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus4YearsAmt | 0 | 62664 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/TotalAmt | 0 | 554227 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearAmt | 0 | 10289 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus1YearAmt | 0 | 8045 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus2YearsAmt | 0 | 13441 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus3YearsAmt | 0 | 51944 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus4YearsAmt | 0 | 12709 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/TotalAmt | 0 | 96428 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0.05960 |
| IRS990ScheduleA/InvestmentIncomePYPct | 0 | 0.06630 |
| IRS990ScheduleA/PubliclySupportedOrg509a2Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 0.94040 |
| IRS990ScheduleA/PublicSupportPY509Pct | 0 | 0.93370 |
| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 1522003 |
| IRS990ScheduleA/SubstAndDsqlfyPrsnsTotGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/SubstantialContributorsAmtGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY509Ind | 0 | X |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearAmt | 0 | 454134 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus1YearAmt | 0 | 246204 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 179302 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 558803 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 83560 |
| IRS990ScheduleA/Total509Grp/TotalAmt | 0 | 1522003 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearAmt | 0 | 464423 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus1YearAmt | 0 | 254249 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus2YearsAmt | 0 | 192743 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus3YearsAmt | 0 | 610747 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus4YearsAmt | 0 | 96269 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/TotalAmt | 0 | 1618431 |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/BuildingsGrp/BookValueAmt | 0 | 556157 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 182310 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 738467 |
| IRS990ScheduleD/CollectionUsedPreservationInd | 0 | X |
| IRS990ScheduleD/CollectionUsedPubExhibitionInd | 0 | X |
| IRS990ScheduleD/CollUsedLoanOrExchProgInd | 0 | X |
| IRS990ScheduleD/CollUsedScholarlyRsrchInd | 0 | X |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 5233 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 22955 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 28188 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 422750 |
| IRS990ScheduleD/LandGrp/OtherCostOrOtherBasisAmt | 0 | 422750 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/BookValueAmt | 0 | 212688 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/DepreciationAmt | 0 | 36135 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/OtherCostOrOtherBasisAmt | 0 | 248823 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 0 | 243053 |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 0 | CONSTRUCTION IN PROGRESS |
| IRS990ScheduleD/SolicitedAssetsSaleInd | 0 | 0 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | THE ORGANIZATION'S COLLECTIONS CONSIST OF A LIBRARY OF OVER 33,500 PHOTOGRAPHS, SLIDES AND SIMILAR MATERIALS RELATING TO THE TOWN OF WELLESLEY. AS PART OF THIS LIBRARY, THE ORGANIZATION MAINTAINS A COMPLETE SET OF LOCAL NEWSPAPER EDITIONS AND HISTORIC TOWN RECORDS. THE ORGANIZATION ALSO HOLDS OVER 9,700 ARTIFACTS, INCLUDING FURNITURE, FINE ARTS, COMMEMORATIVE ITEMS AND PERIOD COSTUMES ALONG WTIH GENERAL COLLECTIONS. THE ORGANIZATION HOLDS SEVERAL SPECIAL COLLECTIONS INCLUDING CIVIL WAR LIBRARY, A LACE AND EMBROIDERY COLLECTIONS AND NATURAL HISTORY SPECIMENS WHICH WERE COLLECTED BY LOCAL RESIDENT FAMILIES. THE ORGANIZATIONS COLLECTIONS ARE FOR USE IN PUBLIC EXHIBITIONS BOTH IN THEIR MUSEUM AND ON LOAN. THEY ARE ALSO USED FOR EDUCATIONAL PROGRAM DEVELOPMENT AND HISTORIC RESEARCH. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | THE ORGANIZATION'S COLLECTIONS CONSIST OF A LIBRARY OF OVER 33,500 PHOTOGRAPHS, SLIDES AND SIMILAR MATERIALS RELATING TO THE TOWN OF WELLESLEY. AS PART OF THIS LIBRARY, THE ORGANIZATION MAINTAINS A COMPLETE SET OF LOCAL NEWSPAPER EDITIONS AND HISTORIC TOWN RECORDS. THE ORGANIZATION ALSO HOLDS OVER 9,700 ARTIFACTS, INCLUDING FURNITURE, FINE ARTS, COMMEMORATIVE ITEMS AND PERIOD COSTUMES ALONG WTIH GENERAL COLLECTIONS. THE ORGANIZATION HOLDS SEVERAL SPECIAL COLLECTIONS INCLUDING CIVIL WAR LIBRARY, A LACE AND EMBROIDERY COLLECTIONS AND NATURAL HISTORY SPECIMENS WHICH WERE COLLECTED BY LOCAL RESIDENT FAMILIES. THE ORGANIZATIONS COLLECTIONS ARE FOR USE IN PUBLIC EXHIBITIONS BOTH IN THEIR MUSEUM AND ON LOAN. THEY ARE ALSO USED FOR EDUCATIONAL PROGRAM DEVELOPMENT AND HISTORIC RESEARCH. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 2 | THERE ARE NO UNRECOGNIZED TAX BENEFITS AND TAX RETURNS REMAIN SUBJECT TO EXAMINATION BY MAJOR TAX JURISDICTIONS FOR THE STANDARD THREE YEAR STATUTE OF LIMITATIONS. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART III, LINE 1A: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | PART III, LINE 4: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | PART X, LINE 2: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 1196828 |
| IRS990ScheduleD/TotalBookValueOtherAssetsAmt | 0 | 243053 |
| IRS990ScheduleG/AgrmtProfFundraisingActyInd | 0 | 0 |
| IRS990ScheduleG/FundraisingEventInformationGrp/DirectExpenseSummaryEventsAmt | 0 | 65206 |
| IRS990ScheduleG/FundraisingEventInformationGrp/Event1Nm | 0 | ANNUAL APPEAL |
| IRS990ScheduleG/FundraisingEventInformationGrp/Event2Nm | 0 | SPRING GALA |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent1Amt | 0 | 51939 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent2Amt | 0 | 81610 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsOtherEventsAmt | 0 | 51530 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsTotalAmt | 0 | 185079 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueEvent1Amt | 0 | 51939 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueEvent2Amt | 0 | 81610 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueOtherEventsAmt | 0 | 51530 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueTotalEventsAmt | 0 | 185079 |
| IRS990ScheduleG/FundraisingEventInformationGrp/NetIncomeSummaryAmt | 0 | 119873 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OthDirectExpnssOtherEventsAmt | 0 | 18903 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OthDirectExpnssTotalEventsAmt | 0 | 65206 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherDirectExpensesEvent1Amt | 0 | 0 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherDirectExpensesEvent2Amt | 0 | 46303 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherEventsTotalCnt | 0 | 4 |
| IRS990ScheduleG/InPersonSolicitationsInd | 0 | X |
| IRS990ScheduleG/MailSolicitationsInd | 0 | X |
| IRS990ScheduleG/SpecialFundraisingEventsInd | 0 | X |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE ORGANIZATION HAS MEMBERS |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | MEMBERS HAVE THE POWER TO ELECT OTHER MEMBERS TO THE GOVERNING BODY. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | THE FORM 990 IS E-MAILED TO ALL BOARD MEMBERS FOR THEIR REVIEW BEFORE FILING. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | AN EXECUTIVE BOARD MEETING IS HELD TO INDEPENDENTLY DISCUSS EMPLOYMENT PACKAGE FOR THE ORGANIZATION'S EMPLOYEES. SALARY WAS APPROVED AFTER DISCUSSION AND COMPARISON WITH OTHER EMPLOYEES AT SIMILAR ORGANIZATIONS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | AVAILABLE TO THE PUBLIC UPON REQUEST |
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