Liabilities / Assets
38th percentile
Higher debt load relative to assets than 38% of similar nonprofits.
Winchester Historical Society Inc
EIN 23-7383040 • 501(c)3 • Winchester, MA
Profile
Educational organization to stimulate an interest in winchester, massachusetts' history through public programs; to collect and preserve archival records and artifacts; and to promote scholarship and study of the town's history through the society's website, newsletters and other publications. The organization also promotes and carries out, for the benefit of the general public, the preservation of those significant architectural, historical and cultural resources of winchester, including the sanborn house historical and cultural center.
Siviq Scores
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
0.00x
Liabilities / Revenue
46th percentile
Higher debt load relative to revenue than 46% of similar nonprofits.
Net Margin
79th percentile
Higher net margin than 79% of similar nonprofits.
Top Officer Pay
55th percentile
Higher top officer pay than 55% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
55th percentile
Faster asset growth than 55% of similar nonprofits.
Revenue Growth
60th percentile
Faster revenue growth than 60% of similar nonprofits.
Balance Sheet
Assets
Up$617,419
Up $30,397 (+5.2%) from 2023
Liabilities
Down$1,100
Down $5,450 (-83%) from 2023
Net Assets
Up$616,319
Up $35,847 (+6.2%) from 2023
Revenue
Up$129,788
Up $15,926 (+14%) from 2023
Expenses
Up$93,962
Up $6,757 (+7.7%) from 2023
Net Income
Up$35,826
Up $9,169 (+34%) from 2023
Trend Graphs
Filings
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
- Assets
- $617,419
- Liabilities
- $1,100
- Net assets
- $616,319
- Revenue
- $129,788
- Expenses
- $93,962
- Net income
- $35,826
Latest Filing Detail
Jump To
Filing Snapshot
- Filing Period
- Jan 1, 2024 to Dec 31, 2024
- Signed
- Nov 13, 2025
- Return Version
- 2024v5.2
- Gross Receipts
- $129,788
Mission and Program Overview
Mission
Educational organization to stimulate an interest in winchester, massachusetts' history through public programs; to collect and preserve archival records and artifacts; and to promote scholarship and study of the town's history through the society's website, newsletters and other publications. The organization also promotes and carries out, for the benefit of the general public, the preservation of those significant architectural, historical and cultural resources of winchester, including the sanborn house historical and cultural center.
Balance Sheet Detail
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Land, Buildings, and Equipment, Net | $511,225 | $567,942 | ▲ $56,717 |
| Savings and Temporary Cash Investments | $72,984 | $46,609 | ▼ $26,375 |
| Prepaid Expenses and Deferred Charges | $2,624 | $2,668 | ▲ $44 |
| Investments Other Securities | $189 | $200 | ▲ $11 |
| Total Assets | $587,022 | $617,419 | ▲ $30,397 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $6,550 | $1,100 | ▼ $5,450 |
| Total Liabilities | $6,550 | $1,100 | ▼ $5,450 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $514,667 | $584,450 | ▲ $69,783 |
| Net Assets With Donor Restrictions | $65,805 | $31,869 | ▼ $33,936 |
| Total Net Assets Fund Balance | $580,472 | $616,319 | ▲ $35,847 |
| Total Liabilities and Net Assets / Fund Balance | $587,022 | $617,419 | ▲ $30,397 |
Asset Categories
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $567,253 | $197,243 | $764,496 |
| Other Land Buildings | $689 | $23,763 | $24,452 |
Compensation and Service Providers
Board Members and Trustees
| Name | Title |
|---|---|
| Electra Govoni | President |
| Susan Turpin | Vice President |
| Hilda Wong-doo | Director |
| Joyce Westner | Director |
| Ronald Latanision | Director |
| Thomas Sevigny | Director |
| William Swanton | Director |
| Linda Doucette | Secretary/clerk |
| Ernestine Ravanis | Treasurer |
Revenue and Support
Revenue Composition
- Contributions and Grants
- $78,131
- Program Service Revenue
- $50,211
- Investment Income
- $1,446
- Other Revenue
- $0
- All Other Contributions
- $66,051
- Change in Net Assets
- $35,826
Audited Revenue Reconciliation
- Revenue per Audited Statements
- $129,788
- Revenue Not Reported on Financial Statements
- $0
- Revenue Not Reported on Form 990
- $21
- Total Revenue per Audited Statements
- $129,809
- Total Revenue per Form 990
- $129,788
Expenses and Functional Allocation
Major Expense Lines
| Line Item | Amount |
|---|---|
| Other Expenses | $93,962 |
| Total Fundraising Expense | $3,360 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Salaries, Compensation, and Employee Benefits | $0 |
Functional Expense Allocation
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Depreciation Depletion | $17,317 | $2,104 | - | $19,421 |
| Fees for Services Other | $15,260 | - | - | $15,260 |
| Information Technology | $4,816 | - | - | $4,816 |
| All Other Expenses | $3,940 | $367 | $354 | $4,661 |
| Office Expenses | $3,695 | - | - | $3,695 |
| Fees for Services Accounting | - | $3,350 | - | $3,350 |
| Insurance | $3,097 | - | - | $3,097 |
| Other Expenses | $9,671 | - | $3,006 | $3,006 |
| Total Functional Expenses | $84,781 | $5,821 | $3,360 | $93,962 |
Audited Expense Reconciliation
| Line Item | Amount |
|---|---|
| Expenses per Audited Statements | $93,962 |
| Total Expenses per Audited Statements | $93,962 |
| Total Expenses per Form 990 | $93,962 |
| Expenses Not Reported on Financial Statements | $0 |
| Expenses Not Reported on Form 990 | $0 |
Fundraising, Events, and Gaming
- Fundraising activities
- No
- Gaming activities
- No
- Professional fundraiser used
- No
Fundraising and Gaming Totals
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
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
- Yes
- Annual disclosure for covered persons
- Yes
- Audit committee
- Yes
- 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
- No
- Other officer compensation reviewed
- No
- Conflict-of-interest policy
- Yes
- Audited financial statements prepared
- No
- Key decisions subject to board approval
- No
- Management duties delegated
- No
Governance Explanations
Form 990, Part VI, Section B, Line 11B
“A copy of the form 990 is provided to the board of trustees for comments and questions prior to its filing. There is ample opportunity for any changes to be made before the form is submitted.”
Form 990, Part VI, Section C, Line 18
“The organization's financial statements are available online for viewing at the massachusetts attorney general's division for public charities website and upon request.”
Form 990, Part VI, Section C, Line 19
“The organization's tax filings are available online for viewing at www2.guidestar.org, a website used to rate nonprofits for potential donors. The tax filings are also available at the massachusetts attorney general's division for public charities website and upon request.”
Filing and Contact Details
Filer
- Filer Name
- Winchester Historical Society Inc
- EIN
- 23-7383040
- Phone
- 7817210135
- Address
- 15 HIGH STREET, WINCHESTER, MA 01890
Signing Officer
- Name
- Ernestine Ravanis
- Title
- Treasurer
- Phone
- 7817210135
- Signed
- 2025-11-13
- Discuss with paid preparer
- Yes
Organization Details
- Principal Officer
- Ernestine Ravanis
- Formed
- 1976
- Legal Domicile
- Ma
- Voting Board Members
- 9
- Independent Board Members
- 9
- Employees
- 0
- Volunteers
- 0
Preparer
- Firm
- Barrett & Scibelli LLC
- Address
- 8 WINCHESTER PLACE 301, WINCHESTER, MA 01890
- Preparer
- Christopher J Barrett CPA
- Phone
- 7815702273
Supplemental Narrative
Additional Explanations
Form 990, Part IX, Line 11G
“Contract labor: program service expenses 15,260. Management and general expenses 0. Fundraising expenses 0. Total expenses 15,260.”
FORM 990, PART XII, LINE 2C:
“Reviewed by the board of directors”
Financial Statement Notes
PART III, LINE 4:
“Collections which were acquired through contributions since the organization's inception are not recognized as assets on the statement of financial position. Proceeds from deaccessions or insurance recoveries are reflected as increases in the appropriate net asset classes.”
PART X, LINE 2:
“The whs is exempt from federal income taxes under section 501(c)(3) of the internal revenue code (the "code"). The whs is not classified as a private foundation and contributions made to the whs are deductible by donors as provided in section 170 of the code. Generally accepted accounting principles in the united states of america prescribe the threshold a tax position is required to meet before being recognized in the financial statements. A liability for uncertain tax positions is recognized and recorded as a component of current income tax expense for differences between financial and income tax reporting positions which do not meet this threshold. Any interest and penalties related to uncertain tax positions are recorded as a component of income tax expense. The whs has reviewed its tax positions that remain subject to examination by tax authorities and has not identified any material uncertain tax positions and thus has not recorded any liability at december 31, 2024 and 2023. The whs's federal and state tax returns are subject to possible examination by taxing authorities until the expiration of the related returns statutes. In general, the federal and state tax returns have a three-year statute of limitation from the date the tax returns were due or filed, whichever is later. The whs is no longer subject to examinations by tax authorities for years prior to 2020 and has no open examinations as of the date of these financial statements”
PART III, LINE 1A:
“Collections which were acquired through contributions since the organization's inception are not recognized as assets on the statement of financial position. Proceeds from deaccessions or insurance recoveries are reflected as increases in the appropriate net asset classes.”
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| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 3695 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | CUSTODIAL SERVICES |
| IRS990/OtherExpensesGrp/Desc | 1 | RESTORATION COSTS |
| IRS990/OtherExpensesGrp/Desc | 2 | UTILITIES |
| IRS990/OtherExpensesGrp/Desc | 3 | SPECIAL EVENTS |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 3006 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 16310 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 10675 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 9671 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 16310 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 10675 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 9671 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 3006 |
| IRS990/OtherWebsiteInd | 0 | X |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 2624 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 2668 |
| IRS990/PrincipalOfficerNm | 0 | ERNESTINE RAVANIS |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 900099 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 900099 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | PROGRAM & RENTAL INCOM |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | SALE OF MERCHANDISE |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 49700 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 511 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 49700 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 511 |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | PUBLICATIONS OF NEWSLETTERS, BOOKS AND BOOKLETS TO EDUCATE THE PUBLIC ABOUT THE HISTORY OF WINCHESTER, MASSACHUSETTS. |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 660 |
| IRS990/ProgSrvcAccomActy3Grp/Desc | 0 | PRESERVE AND COLLECT HISTORICAL TREASURES, BUILDINGS, PAINTINGS, PRINTS AND MAPS ALONG WITH OTHER COSTUMES, ARTIFACTS AND HISTORICAL AND CULTURAL RESOURCES RELATED TO THE TOWN OF WINCHESTER, MASSACHUSETTS, INCLUDING THE SANBORN HOUSE HISTORICAL AND CULTURAL CENTER. |
| IRS990/ProgSrvcAccomActy3Grp/ExpenseAmt | 0 | 48376 |
| IRS990/ProgSrvcAccomActy3Grp/RevenueAmt | 0 | 50211 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 74487 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 1736 |
| IRS990/PYOtherExpensesAmt | 0 | 87205 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 37639 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 26657 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/PYTotalExpensesAmt | 0 | 87205 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 113862 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 35826 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 0 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 72984 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 46609 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 78131 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 74487 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 20726 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 44069 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 30388 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 247801 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 1446 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 1736 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 233 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 288 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 318 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 4021 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 600 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.98400 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.98630 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 247801 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 78131 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 74487 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 20726 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 44069 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 30388 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 247801 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 251822 |
| 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 | 567253 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 197243 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 764496 |
| IRS990ScheduleD/CollectionUsedPreservationInd | 0 | X |
| IRS990ScheduleD/CollectionUsedPubExhibitionInd | 0 | X |
| IRS990ScheduleD/CollUsedScholarlyRsrchInd | 0 | X |
| IRS990ScheduleD/ExpensesNotReportedAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 93962 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/NetUnrealizedGainsInvstAmt | 0 | 21 |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 689 |
| IRS990ScheduleD/OtherLandBuildingsGrp/DepreciationAmt | 0 | 23763 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 24452 |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 21 |
| IRS990ScheduleD/RevenueNotReportedFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 129788 |
| IRS990ScheduleD/SolicitedAssetsSaleInd | 0 | 0 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | COLLECTIONS WHICH WERE ACQUIRED THROUGH CONTRIBUTIONS SINCE THE ORGANIZATION'S INCEPTION ARE NOT RECOGNIZED AS ASSETS ON THE STATEMENT OF FINANCIAL POSITION. PROCEEDS FROM DEACCESSIONS OR INSURANCE RECOVERIES ARE REFLECTED AS INCREASES IN THE APPROPRIATE NET ASSET CLASSES. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | THE WHS IS EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE (THE "CODE"). THE WHS IS NOT CLASSIFIED AS A PRIVATE FOUNDATION AND CONTRIBUTIONS MADE TO THE WHS ARE DEDUCTIBLE BY DONORS AS PROVIDED IN SECTION 170 OF THE CODE. GENERALLY ACCEPTED ACCOUNTING PRINCIPLES IN THE UNITED STATES OF AMERICA PRESCRIBE THE THRESHOLD A TAX POSITION IS REQUIRED TO MEET BEFORE BEING RECOGNIZED IN THE FINANCIAL STATEMENTS. A LIABILITY FOR UNCERTAIN TAX POSITIONS IS RECOGNIZED AND RECORDED AS A COMPONENT OF CURRENT INCOME TAX EXPENSE FOR DIFFERENCES BETWEEN FINANCIAL AND INCOME TAX REPORTING POSITIONS WHICH DO NOT MEET THIS THRESHOLD. ANY INTEREST AND PENALTIES RELATED TO UNCERTAIN TAX POSITIONS ARE RECORDED AS A COMPONENT OF INCOME TAX EXPENSE. THE WHS HAS REVIEWED ITS TAX POSITIONS THAT REMAIN SUBJECT TO EXAMINATION BY TAX AUTHORITIES AND HAS NOT IDENTIFIED ANY MATERIAL UNCERTAIN TAX POSITIONS AND THUS HAS NOT RECORDED ANY LIABILITY AT DECEMBER 31, 2024 AND 2023. THE WHS'S FEDERAL AND STATE TAX RETURNS ARE SUBJECT TO POSSIBLE EXAMINATION BY TAXING AUTHORITIES UNTIL THE EXPIRATION OF THE RELATED RETURNS STATUTES. IN GENERAL, THE FEDERAL AND STATE TAX RETURNS HAVE A THREE-YEAR STATUTE OF LIMITATION FROM THE DATE THE TAX RETURNS WERE DUE OR FILED, WHICHEVER IS LATER. THE WHS IS NO LONGER SUBJECT TO EXAMINATIONS BY TAX AUTHORITIES FOR YEARS PRIOR TO 2020 AND HAS NO OPEN EXAMINATIONS AS OF THE DATE OF THESE FINANCIAL STATEMENTS |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 2 | COLLECTIONS WHICH WERE ACQUIRED THROUGH CONTRIBUTIONS SINCE THE ORGANIZATION'S INCEPTION ARE NOT RECOGNIZED AS ASSETS ON THE STATEMENT OF FINANCIAL POSITION. PROCEEDS FROM DEACCESSIONS OR INSURANCE RECOVERIES ARE REFLECTED AS INCREASES IN THE APPROPRIATE NET ASSET CLASSES. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART III, LINE 4: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | PART X, LINE 2: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | PART III, LINE 1A: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 567942 |
| IRS990ScheduleD/TotalExpensesPerForm990Amt | 0 | 93962 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 129788 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 129809 |
| IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt | 0 | 93962 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | A COPY OF THE FORM 990 IS PROVIDED TO THE BOARD OF TRUSTEES FOR COMMENTS AND QUESTIONS PRIOR TO ITS FILING. THERE IS AMPLE OPPORTUNITY FOR ANY CHANGES TO BE MADE BEFORE THE FORM IS SUBMITTED. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | THE ORGANIZATION'S FINANCIAL STATEMENTS ARE AVAILABLE ONLINE FOR VIEWING AT THE MASSACHUSETTS ATTORNEY GENERAL'S DIVISION FOR PUBLIC CHARITIES WEBSITE AND UPON REQUEST. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | THE ORGANIZATION'S TAX FILINGS ARE AVAILABLE ONLINE FOR VIEWING AT WWW2.GUIDESTAR.ORG, A WEBSITE USED TO RATE NONPROFITS FOR POTENTIAL DONORS. THE TAX FILINGS ARE ALSO AVAILABLE AT THE MASSACHUSETTS ATTORNEY GENERAL'S DIVISION FOR PUBLIC CHARITIES WEBSITE AND UPON REQUEST. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | CONTRACT LABOR: PROGRAM SERVICE EXPENSES 15,260. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 15,260. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | REVIEWED BY THE BOARD OF DIRECTORS |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION C, LINE 18 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTION C, LINE 19 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PART IX, LINE 11G |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | FORM 990, PART XII, LINE 2C: |
| IRS990/SchoolOperatingInd | 0 | 0 |
| IRS990/SignificantChangeInd | 0 | 0 |
| IRS990/SignificantNewProgramSrvcInd | 0 | 0 |
| IRS990/StatesWhereCopyOfReturnIsFldCd | 0 | MA |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | 0 |
| IRS990/SubjectToProxyTaxInd | 0 | 0 |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | 0 |
| IRS990/TaxablePartyNotificationInd | 0 | 0 |
| IRS990/TaxExemptBondsInd | 0 | 0 |
| IRS990/TerminateOperationsInd | 0 | 0 |
| IRS990/TotalAssetsBOYAmt | 0 | 587022 |
| IRS990/TotalAssetsEOYAmt | 0 | 617419 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 587022 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 617419 |
| IRS990/TotalCompGreaterThan150KInd | 0 | 0 |
| IRS990/TotalContributionsAmt | 0 | 78131 |
| IRS990/TotalEmployeeCnt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 3360 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 5821 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 84781 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 93962 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 6550 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 1100 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 6550 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 1100 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 580472 |
| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 616319 |
| IRS990/TotalOtherCompensationAmt | 0 | 0 |
| IRS990/TotalProgramServiceExpensesAmt | 0 | 84781 |
| IRS990/TotalProgramServiceRevenueAmt | 0 | 50211 |
| IRS990/TotalReportableCompFromOrgAmt | 0 | 0 |
| IRS990/TotalRevenueGrp/ExclusionAmt | 0 | 1446 |
| IRS990/TotalRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 50211 |
| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 129788 |
| IRS990/TotalRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/TotalVolunteersCnt | 0 | 0 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 587022 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 617419 |
| IRS990/TotReportableCompRltdOrgAmt | 0 | 0 |
| IRS990/TrnsfrExmptNonChrtblRltdOrgInd | 0 | 0 |
| IRS990/TypeOfOrganizationCorpInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | 0 |
| IRS990/UponRequestInd | 0 | X |
| IRS990/USAddress/AddressLine1Txt | 0 | 15 HIGH STREET |
| IRS990/USAddress/CityNm | 0 | WINCHESTER |
| IRS990/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/USAddress/ZIPCd | 0 | 01890 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 9 |
| IRS990/VotingMembersIndependentCnt | 0 | 9 |
| IRS990/WebsiteAddressTxt | 0 | WWW.WINCHESTERHISTORICALSOCIETY.ORG |
| IRS990/WhistleblowerPolicyInd | 0 | 1 |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd | 0 | 1 |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | ERNESTINE RAVANIS |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | TREASURER |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 7817210135 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2025-11-13 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | WINCHESTER HISTORICAL SOCIETY INC |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | WINC |
| ReturnHeader/Filer/EIN | 0 | 237383040 |
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