Liabilities / Assets
71st percentile
Higher debt load relative to assets than 71% of similar nonprofits.
EIN 04-6050221 • 501(c)3 • Braintree, MA
Profile
Historical research, education, maintenance and preservation of the birthplace of sylvanus thayer.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
71st percentile
Higher debt load relative to assets than 71% of similar nonprofits.
Liabilities / Revenue
95th percentile
Higher debt load relative to revenue than 95% of similar nonprofits.
Net Margin
29th percentile
Higher net margin than 29% of similar nonprofits.
Top Officer Pay
40th percentile
Higher top officer pay than 40% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
37th percentile
Faster asset growth than 37% of similar nonprofits.
Revenue Growth
23rd percentile
Faster revenue growth than 23% of similar nonprofits.
Assets
Down$1,654,098
Down $9,238 (-0.6%) from 2024
Liabilities
Down$418,077
Down $3,016 (-0.7%) from 2024
Net Assets
Down$1,236,021
Down $6,222 (-0.5%) from 2024
Revenue
Down$141,817
Down $15,541 (-9.9%) from 2024
Expenses
Down$148,039
Down $83,449 (-36%) from 2024
Net Income
Up-$6,222
Up $67,908 (+92%) from 2024
Most recent year
2025 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.
Historical research, education, maintenance and preservation of the Birthplace of Sylvanus Thayer.
Historical research,education, and maintenance and preservation of the birthplace of sylvanus thayer.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Land, Buildings, and Equipment, Net | $1,177,249 | $1,128,584 | ▼ $48,665 |
| Cash and Non-Interest-Bearing Accounts | $49,752 | $89,841 | ▲ $40,089 |
| Inventories for Sale or Use | $4,500 | $2,084 | ▼ $2,416 |
| Savings and Temporary Cash Investments | - | $1,754 | - |
| Total Assets | $1,663,336 | $1,654,098 | ▼ $9,238 |
| Other Assets Total | $431,835 | $431,835 | → $0 |
| Liabilities | |||
| Mortgage Notes Payable Secured by Investment Property | $418,793 | $418,077 | ▼ $716 |
| Other Liabilities | $2,300 | $0 | ▼ $2,300 |
| Total Liabilities | $421,093 | $418,077 | ▼ $3,016 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $714,858 | $678,322 | ▼ $36,536 |
| Net Assets With Donor Restrictions | $558,127 | $558,127 | → $0 |
| Total Net Assets Fund Balance | $1,242,243 | $1,236,021 | ▼ $6,222 |
| Total Liabilities and Net Assets / Fund Balance | $1,663,336 | $1,654,098 | ▼ $9,238 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $829,140 | $1,082,808 | $1,911,948 |
| Land | $298,719 | - | $298,719 |
| Equipment | $725 | $79,291 | $80,016 |
| Other Assets Org | $431,835 | - | - |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2025 | $11,384 | - | - | - | $11,384 |
| 2024 | $11,384 | - | - | - | $11,384 |
| 2023 | $11,384 | - | - | - | $11,384 |
| 2022 | $11,384 | - | - | - | $11,384 |
| 2021 | $11,384 | - | - | - | $11,384 |
| Name | Title |
|---|---|
| Robert Harris | Immediate Past President |
| Derek Manning | President |
| Christopher Griffin | Vice President |
| Sonya Shaw | Vice President |
| Adrienne Whitehouse | Director |
| Claudia Shutter | Director |
| Gail Burns | Director |
| Gail Saccone | Director |
| Justine Huang | Director |
| Marta Googins | Director |
| Ryan Daniels | Director |
| Stephen Leonard | Director |
| Noreen Goodhue | Clerk |
| Alan Flowers | Corresponding Secretary |
| Mary Frazier | Curator |
| John Thompson | Treasurer |
| Line Item | Amount |
|---|---|
| Other Expenses | $148,039 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Salaries, Compensation, and Employee Benefits | $0 |
| Total Fundraising Expense | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Depreciation Depletion | $43,799 | $4,866 | - | $48,665 |
| Other Expenses | $29,725 | $2,011 | - | $31,736 |
| Insurance | $11,282 | $11,282 | - | $22,564 |
| Occupancy | $14,838 | $6,359 | - | $21,197 |
| Interest | - | $12,420 | - | $12,420 |
| Office Expenses | - | $6,912 | - | $6,912 |
| Fees for Services Accounting | - | $3,380 | - | $3,380 |
| Fees for Services Other | $1,165 | - | - | $1,165 |
| Total Functional Expenses | $100,809 | $47,230 | $0 | $148,039 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
| Interested Party | Relationship | Description | Shared Revenue | Amount |
|---|---|---|---|---|
| Aziz Karsan Robert Harris | Officers | Rent Space From Braintree Historical Society | No | $18,890 |
“A copy of form 990 needs to be provided to the directors for reviewing and the organization must have the directors consent to file the form 990.”
“No regulartory needs. Copies of all filings are provided to the office of the massachusetts attorney general, division of public charities and are available for public inspection.”
“The following are the current year historical structure holdings and changes in historical structure holdings of the organization: the organization ownes a historical structure now as the sylvania thayer birthplace located at 786 washington street braintree ma donated to the organization with an estimated fair value at the time the donation & improvements of $429,506. The organization owns an historical structure know as the gilbert barn/museum & renovations located at 31 tenney road braintree ma with a cost of $801,645. The organization owns an historical structure & renovations known as the french house located at 766 washington street braintree ma donated in 1999 with a estimated fair market value of $530,833. The organization owns an historical structure known as the gallivan house located at 776 washington street braintree ma purchase for $691,997 in 2005. This property was partially financed with a $450,000 note and $33,500 loan from the thayer birthplace endowment trust (the "endowment trust"), which the organization is the sole beneficiary. During the year ended april 30, 2009 the organization transferred this property to the braintree historical society thayer birthplace nominee trust (the"nominee trust") in exchange for 48% beneficial interest in the nominee trust. The endowment trust received 52% beneficial interest in the nominee trust in exchange for the second mortgage on the property in the amount of $450,000 due from the organization. In april 2004 the town of braintree ma donated a historical structure known as the mary bean cunningham research center/library located at 85 quincy ave braintree ma via a 99 year lease and was recorded as a capital lease and donation estimated fair value of $815,000. In december 2008 the organization entered into an agreement with the town of braintree ma to terminate the 99 year lease and return the property to the town. As a result the organization reported a loss for the year ended april 30, 2009 on the capital lease and renovations abandonment of $766,943.”
“The endowment trust funds was created and shall operate exclusively for charitable, historical or educational purposes in the town of braintree, ma and more particular for the benefit of the braintree historical society, inc. Or the the general sylvanus thayer birthplace so long as either shall be in effective existance.”
“The company does not believe it has taken any material uncertain tax positions and, accordingly, it has not recorded any liability for unrecognized tax benefits, penalty or interest for the year ended april 30, 2025.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
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| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | HISTORICAL RESEARCH,EDUCATION, AND MAINTENANCE AND PRESERVATION OF THE BIRTHPLACE OF SYLVANUS THAYER. |
| IRS990/AllOtherContributionsAmt | 0 | 99476 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | THE ORGANIZATION |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 7818481640 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 31 TENNEY ROAD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | BRAINTREE |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02184 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 1 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 49752 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 89841 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 1 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 0 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 0 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CostOfGoodsSoldAmt | 0 | 2416 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 119707 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 0 |
| IRS990/CYOtherExpensesAmt | 0 | 148039 |
| IRS990/CYOtherRevenueAmt | 0 | 21305 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 805 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -6222 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/CYTotalExpensesAmt | 0 | 148039 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 141817 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 4866 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 43799 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 48665 |
| IRS990/Desc | 0 | HISTORICAL RESEARCH AND PRESERVATION OF THAYER BIRTHPLACE AND HISTORIC RELICS OF THE TOWN OF BRAINTREE |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 0 |
| IRS990/DonorAdvisedFundInd | 0 | 1 |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 558127 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 558127 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 100809 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
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| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 3380 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 1165 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 1165 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 8.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 0.50 |
| 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 | 8.00 |
| 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/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/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
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| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 0 |
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| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | GAIL BURNS |
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| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | DEREK MANNING |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | CHRISTOPHER GRIFFIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | CLAUDIA SHUTTER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | ADRIENNE WHITEHOUSE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | STEPHEN LEONARD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | SONYA SHAW |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | NOREEN GOODHUE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | ALAN FLOWERS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | MARY FRAZIER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | ROBERT HARRIS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | MARTA GOOGINS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | RYAN DANIELS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | JUSTINE HUANG |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | JOHN THOMPSON |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| 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 |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 14 | 0 |
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| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | CLERK |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | CORRESPONDING SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | CURATOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | IMMEDIATE PAST PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | TREASURER |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1938 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 16 |
| IRS990/GovernmentGrantsAmt | 0 | 14405 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 144233 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 18890 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 4831 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 16 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 11282 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 11282 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 22564 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 12420 |
| IRS990/InterestGrp/TotalAmt | 0 | 12420 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 4500 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 2084 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 1162099 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 1177249 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 1128584 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 2290683 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 0 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembershipDuesAmt | 0 | 5826 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | HISTORICAL RESEARCH, EDUCATION, MAINTENANCE AND PRESERVATION OF THE BIRTHPLACE OF SYLVANUS THAYER. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 418793 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 418077 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 1242243 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1236021 |
| IRS990/NetIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 2415 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 2415 |
| IRS990/NetRentalIncomeOrLossGrp/ExclusionAmt | 0 | 18890 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 18890 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 714858 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 678322 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 6359 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 14838 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 21197 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 6912 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 6912 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 431835 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 431835 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | REPAIRS AND MAINTENANCE |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 2011 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 29725 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 31736 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 2300 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 0 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrincipalOfficerNm | 0 | DEREK MANNING |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 713990 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | PROGRAMS/EVENTS |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 805 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 805 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 124889 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 231488 |
| IRS990/PYOtherRevenueAmt | 0 | 31250 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 1219 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -74130 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/PYTotalExpensesAmt | 0 | 231488 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 157358 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -6222 |
| IRS990/RelatedEntityInd | 0 | 1 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | 18890 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 1 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 3220 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 1754 |
| IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearAmt | 0 | 119707 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus1YearAmt | 0 | 124889 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 28452 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 53532 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 36938 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/TotalAmt | 0 | 363518 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearAmt | 0 | 18890 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus1YearAmt | 0 | 30750 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 27600 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 27603 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 30104 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/TotalAmt | 0 | 134947 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearAmt | 0 | 5636 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus1YearAmt | 0 | 2219 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus2YearsAmt | 0 | 2328 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus3YearsAmt | 0 | 1383 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus4YearsAmt | 0 | 1010 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/TotalAmt | 0 | 12576 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearAmt | 0 | 18890 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus1YearAmt | 0 | 30750 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus2YearsAmt | 0 | 27600 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus3YearsAmt | 0 | 27603 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus4YearsAmt | 0 | 30104 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/TotalAmt | 0 | 134947 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0.26410 |
| IRS990ScheduleA/InvestmentIncomePYPct | 0 | 0.27380 |
| IRS990ScheduleA/PubliclySupportedOrg509a2Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 0.73590 |
| IRS990ScheduleA/PublicSupportPY509Pct | 0 | 0.72620 |
| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 376094 |
| IRS990ScheduleA/SubstAndDsqlfyPrsnsTotGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/SubstantialContributorsAmtGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY509Ind | 0 | X |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearAmt | 0 | 125343 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus1YearAmt | 0 | 127108 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 30780 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 54915 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 37948 |
| IRS990ScheduleA/Total509Grp/TotalAmt | 0 | 376094 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearAmt | 0 | 144233 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus1YearAmt | 0 | 157858 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus2YearsAmt | 0 | 58380 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus3YearsAmt | 0 | 82518 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus4YearsAmt | 0 | 68052 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/TotalAmt | 0 | 511041 |
| IRS990/ScheduleBRequiredInd | 0 | 0 |
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| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 1082808 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 1911948 |
| IRS990ScheduleD/CollectionUsedPreservationInd | 0 | X |
| IRS990ScheduleD/CollectionUsedPubExhibitionInd | 0 | X |
| IRS990ScheduleD/CollUsedScholarlyRsrchInd | 0 | X |
| IRS990ScheduleD/CYEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 11384 |
| IRS990ScheduleD/CYEndwmtFundGrp/EndYearBalanceAmt | 0 | 11384 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 11384 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 11384 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 11384 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 11384 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 11384 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 11384 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 11384 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 11384 |
| IRS990ScheduleD/DisclosedForCharitablePrpsInd | 0 | 0 |
| IRS990ScheduleD/DisclosedOrgLegCtrlInd | 0 | 0 |
| IRS990ScheduleD/DonorAdvisedFundsVlEOYAmt | 0 | 11384 |
| IRS990ScheduleD/EndowmentsHeldRelatedOrgInd | 0 | 1 |
| IRS990ScheduleD/EndowmentsHeldUnrelatedOrgInd | 0 | 0 |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 725 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 79291 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 80016 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/FundsAndOtherAccountsVlEOYAmt | 0 | 3447 |
| IRS990ScheduleD/HistoricStructureInd | 0 | X |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 298719 |
| IRS990ScheduleD/LandGrp/OtherCostOrOtherBasisAmt | 0 | 298719 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 0 | 431835 |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 0 | BENEFICIAL INTEREST IN PERPETUAL TRUST |
| IRS990ScheduleD/RelatedOrgListSchRInd | 0 | 1 |
| IRS990ScheduleD/SolicitedAssetsSaleInd | 0 | 0 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | THE FOLLOWING ARE THE CURRENT YEAR HISTORICAL STRUCTURE HOLDINGS AND CHANGES IN HISTORICAL STRUCTURE HOLDINGS OF THE ORGANIZATION: THE ORGANIZATION OWNES A HISTORICAL STRUCTURE NOW AS THE SYLVANIA THAYER BIRTHPLACE LOCATED AT 786 WASHINGTON STREET BRAINTREE MA DONATED TO THE ORGANIZATION WITH AN ESTIMATED FAIR VALUE AT THE TIME THE DONATION & IMPROVEMENTS OF $429,506. THE ORGANIZATION OWNS AN HISTORICAL STRUCTURE KNOW AS THE GILBERT BARN/MUSEUM & RENOVATIONS LOCATED AT 31 TENNEY ROAD BRAINTREE MA WITH A COST OF $801,645. THE ORGANIZATION OWNS AN HISTORICAL STRUCTURE & RENOVATIONS KNOWN AS THE FRENCH HOUSE LOCATED AT 766 WASHINGTON STREET BRAINTREE MA DONATED IN 1999 WITH A ESTIMATED FAIR MARKET VALUE OF $530,833. THE ORGANIZATION OWNS AN HISTORICAL STRUCTURE KNOWN AS THE GALLIVAN HOUSE LOCATED AT 776 WASHINGTON STREET BRAINTREE MA PURCHASE FOR $691,997 IN 2005. THIS PROPERTY WAS PARTIALLY FINANCED WITH A $450,000 NOTE AND $33,500 LOAN FROM THE THAYER BIRTHPLACE ENDOWMENT TRUST (THE "ENDOWMENT TRUST"), WHICH THE ORGANIZATION IS THE SOLE BENEFICIARY. DURING THE YEAR ENDED APRIL 30, 2009 THE ORGANIZATION TRANSFERRED THIS PROPERTY TO THE BRAINTREE HISTORICAL SOCIETY THAYER BIRTHPLACE NOMINEE TRUST (THE"NOMINEE TRUST") IN EXCHANGE FOR 48% BENEFICIAL INTEREST IN THE NOMINEE TRUST. THE ENDOWMENT TRUST RECEIVED 52% BENEFICIAL INTEREST IN THE NOMINEE TRUST IN EXCHANGE FOR THE SECOND MORTGAGE ON THE PROPERTY IN THE AMOUNT OF $450,000 DUE FROM THE ORGANIZATION. IN APRIL 2004 THE TOWN OF BRAINTREE MA DONATED A HISTORICAL STRUCTURE KNOWN AS THE MARY BEAN CUNNINGHAM RESEARCH CENTER/LIBRARY LOCATED AT 85 QUINCY AVE BRAINTREE MA VIA A 99 YEAR LEASE AND WAS RECORDED AS A CAPITAL LEASE AND DONATION ESTIMATED FAIR VALUE OF $815,000. IN DECEMBER 2008 THE ORGANIZATION ENTERED INTO AN AGREEMENT WITH THE TOWN OF BRAINTREE MA TO TERMINATE THE 99 YEAR LEASE AND RETURN THE PROPERTY TO THE TOWN. AS A RESULT THE ORGANIZATION REPORTED A LOSS FOR THE YEAR ENDED APRIL 30, 2009 ON THE CAPITAL LEASE AND RENOVATIONS ABANDONMENT OF $766,943. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | THE ENDOWMENT TRUST FUNDS WAS CREATED AND SHALL OPERATE EXCLUSIVELY FOR CHARITABLE, HISTORICAL OR EDUCATIONAL PURPOSES IN THE TOWN OF BRAINTREE, MA AND MORE PARTICULAR FOR THE BENEFIT OF THE BRAINTREE HISTORICAL SOCIETY, INC. OR THE THE GENERAL SYLVANUS THAYER BIRTHPLACE SO LONG AS EITHER SHALL BE IN EFFECTIVE EXISTANCE. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 2 | THE COMPANY DOES NOT BELIEVE IT HAS TAKEN ANY MATERIAL UNCERTAIN TAX POSITIONS AND, ACCORDINGLY, IT HAS NOT RECORDED ANY LIABILITY FOR UNRECOGNIZED TAX BENEFITS, PENALTY OR INTEREST FOR THE YEAR ENDED APRIL 30, 2025. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART III, LINE 4: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | PART V, LINE 4: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | PART X, LINE 2: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 1128584 |
| IRS990ScheduleD/TotalBookValueOtherAssetsAmt | 0 | 431835 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990ScheduleL/BusTrInvolveInterestedPrsnGrp/NameOfInterested/PersonNm | 0 | AZIZ KARSAN ROBERT HARRIS |
| IRS990ScheduleL/BusTrInvolveInterestedPrsnGrp/RelationshipDescriptionTxt | 0 | OFFICERS |
| IRS990ScheduleL/BusTrInvolveInterestedPrsnGrp/SharingOfRevenuesInd | 0 | 0 |
| IRS990ScheduleL/BusTrInvolveInterestedPrsnGrp/TransactionAmt | 0 | 18890 |
| IRS990ScheduleL/BusTrInvolveInterestedPrsnGrp/TransactionDesc | 0 | RENT SPACE FROM BRAINTREE HISTORICAL SOCIETY |
| IRS990ScheduleL/SupplementalInformationDetail/ExplanationTxt | 0 | DURING THE YEARS ENDED APRIL 30, 2025. THE COMPANY'S TWO DIRECTORS RENTED THE COMPANY'S FRENCH HOUSE FOR THEIR LIVING AND OFFICE SPACE. THE COMPANY RECORDED RENT INCOME FROM THESE TWO RELATED PARTIES IN THE AMOUNT OF $18,890 FOR THE YEAR ENDED APRIL 30, 2025. |
| IRS990ScheduleL/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART X LINE 6 RECEIVABLE FROM RELATED PARTY |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | A COPY OF FORM 990 NEEDS TO BE PROVIDED TO THE DIRECTORS FOR REVIEWING AND THE ORGANIZATION MUST HAVE THE DIRECTORS CONSENT TO FILE THE FORM 990. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | NO REGULARTORY NEEDS. COPIES OF ALL FILINGS ARE PROVIDED TO THE OFFICE OF THE MASSACHUSETTS ATTORNEY GENERAL, DIVISION OF PUBLIC CHARITIES AND ARE AVAILABLE FOR PUBLIC INSPECTION. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION C, LINE 19 |
| IRS990ScheduleR/AssetExchangeInd | 0 | 0 |
| IRS990ScheduleR/AssetPurchaseFromOtherOrgInd | 0 | 0 |
| IRS990ScheduleR/AssetSaleToOtherOrgInd | 0 | 0 |
| IRS990ScheduleR/DivRelatedOrganizationInd | 0 | 0 |
| IRS990ScheduleR/GiftGrntCapContriFromOthOrgInd | 0 | 0 |
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