Liabilities / Assets
64th percentile
Higher debt load relative to assets than 64% of similar nonprofits.
EIN 23-2232675 • 501(c)3 • Philadelphia, PA
Profile
To preserve and educate people about the historic buildings and grounds at 6401 germantown ave., philadelphia, pa known as cliveden (site of 1777 revolutionary war battle of germantown).
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
64th percentile
Higher debt load relative to assets than 64% of similar nonprofits.
Liabilities / Revenue
71st percentile
Higher debt load relative to revenue than 71% of similar nonprofits.
Net Margin
33rd percentile
Higher net margin than 33% of similar nonprofits.
Top Officer Pay
84th percentile
Higher top officer pay than 84% of similar nonprofits.
Top officer pay equals 15.8% of source-year revenue.
Asset Growth
50th percentile
Faster asset growth than 50% of similar nonprofits.
Revenue Growth
29th percentile
Faster revenue growth than 29% of similar nonprofits.
Assets
Up$894,724
Up $28,157 (+3.2%) from 2023
Liabilities
Up$63,072
Up $5,569 (+9.7%) from 2023
Net Assets
Up$831,652
Up $22,588 (+2.8%) from 2023
Revenue
Down$584,850
Down $43,791 (-7.0%) from 2023
Expenses
Down$602,663
Down $66,037 (-9.9%) from 2023
Net Income
Up-$17,813
Up $22,246 (+56%) from 2023
Most recent year
2024 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.
To preserve and educate people about the historic buildings and grounds at 6401 germantown ave., philadelphia, pa known as cliveden and upsala (site of 1777 revolutionary war battle of germantown).
To preserve and educate people about the historic buildings and grounds at 6401 germantown ave., philadelphia, pa known as cliveden (site of 1777 revolutionary war battle of germantown)
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $647,405 | $676,408 | ▲ $29,003 |
| Land, Buildings, and Equipment, Net | $207,864 | $199,739 | ▼ $8,125 |
| Cash and Non-Interest-Bearing Accounts | - | $10,566 | - |
| Prepaid Expenses and Deferred Charges | $7,062 | $8,011 | ▲ $949 |
| Accounts Receivable | $2,550 | - | - |
| Savings and Temporary Cash Investments | $1,686 | - | - |
| Total Assets | $866,567 | $894,724 | ▲ $28,157 |
| Liabilities | |||
| Other Liabilities | $25,997 | $32,254 | ▲ $6,257 |
| Accounts Payable and Accrued Expenses | $31,506 | $30,818 | ▼ $688 |
| Total Liabilities | $57,503 | $63,072 | ▲ $5,569 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $809,064 | $762,152 | ▼ $46,912 |
| Net Assets With Donor Restrictions | - | $69,500 | - |
| Total Net Assets Fund Balance | $809,064 | $831,652 | ▲ $22,588 |
| Total Liabilities and Net Assets / Fund Balance | $866,567 | $894,724 | ▲ $28,157 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Leasehold Improvements | $199,739 | $140,376 | $340,115 |
| Equipment | - | $40,746 | $40,746 |
| Name | Title | Base | Total |
|---|---|---|---|
| Nancy Van Dolsen | CEO | $92,671 | $92,671 |
| Name | Title |
|---|---|
| Conrad Person | Chairman |
| Alan Keiser | Director |
| Brad Roeder | Director |
| Brian Ames | Director |
| Garth Herrick | Director |
| Glenn Bergman | Director |
| Joan Countryman | Director |
| Randall Miller | Director |
| Seri Worden | Director |
| Theodore Reed | Director |
| Violette Levy | Director |
| Susan Leidy | Interim Trea |
| Darryl Ford | Secretary |
| Ahsan Nastratullah | Treasurer |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $338,707 |
| Other Expenses | $263,956 |
| Total Fundraising Expense | $37,611 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $165,824 | $82,912 | $27,637 | $276,373 |
| Other Employee Benefits | $19,247 | $9,624 | $5,499 | $34,370 |
| All Other Expenses | $17,880 | $7,667 | - | $25,547 |
| Other Expenses | $23,164 | $6,543 | - | $23,164 |
| Payroll Taxes | $12,404 | $6,202 | $3,545 | $22,151 |
| Insurance | - | $17,393 | - | $17,393 |
| Office Expenses | $12,457 | $3,114 | - | $15,571 |
| Advertising | $12,873 | - | - | $12,873 |
| Fees for Services Accounting | - | $10,530 | - | $10,530 |
| Depreciation Depletion | $8,126 | - | - | $8,126 |
| Pension Plan Contributions | $3,255 | $1,628 | $930 | $5,813 |
| Interest | - | $3,189 | - | $3,189 |
| Conferences and Meetings | $594 | $1,206 | - | $1,800 |
| Total Functional Expenses | $398,151 | $166,901 | $37,611 | $602,663 |
| Line Item | Amount |
|---|---|
| Expenses per Audited Statements | $602,663 |
| Total Expenses per Audited Statements | $602,663 |
| Total Expenses per Form 990 | $602,663 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
| Liability | Amount |
|---|---|
| Univest Line of Credit | $32,254 |
“The draft of form 990 and attached schedules were delivered to the executive director, treasurer, audit committee, and the board of directors for their review and approval before filing.”
“If any person with knowledge of any restricted transaction or activity tha t may constitute a potential conflict of interest shall promptly and fully disclose the transaction or activity to the chairman of the board of directors. If the chair after consultation with the executive director, vice chair and the chair of the goverance committee, determines that a transactransaction or activity appears to be a conflict then the chair may (1)reject the propsed transaction or activity; (2)condition the proposed transaction or activity to eliminate the potential conflict; or (3) refer the matter to the executive committee to authorize the transaction or activity after full disclosure and detailed review. The executive committee may authorize the transaction or allow the proposed conflicting activity after full disclosure and detailed review. The transaction or activity may proceed if approved by a majority of the members of the executive committee. If approved, the transaction or activity shall be reported to the full board at the next regularly scheduled meeting of the board.”
“The organization's governing documents, policies and financial statments a re available to the public. Inquires may be made of the officers and board of directors.”
“F/s footnote for art, treasures, etc. The national trust for historic preservation, inc owns the works of art and historical treasures. Cliveden of the national trust, inc. Maintains them. They are held for public exhibition and education.”
“Accounting for uncertainty in income taxes prescribes a recognition threshold and measurement attribute for financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more- likely-than-not to be sustained upon examination by taxing authorities. For the year ended december 31, 2024, the organization has no material uncertain tax positions. The company recognizaed interest and penalties, if any, related to unrecognized tax benefits in interest expense. There were none for the year ended december 31, 2024.”
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/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 30818 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 2550 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | TO PRESERVE AND EDUCATE PEOPLE ABOUT THE HISTORIC BUILDINGS AND GROUNDS AT 6401 GERMANTOWN AVE., PHILADELPHIA, PA KNOWN AS CLIVEDEN (SITE OF 1777 REVOLUTIONARY WAR BATTLE OF GERMANTOWN) |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 12873 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 12873 |
| IRS990/AllOtherContributionsAmt | 0 | 242204 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 7667 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 17880 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 25547 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | false |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | NANCY VAN DOLSEN |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 2158481777 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | C/O 6401 GERMANTOWN AVENUE |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | PHILADELPHIA |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | PA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 19144 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 10566 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | true |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 1206 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 594 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 1800 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 262243 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 26101 |
| IRS990/CYOtherExpensesAmt | 0 | 263956 |
| IRS990/CYOtherRevenueAmt | 0 | 258333 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 38173 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -17813 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 338707 |
| IRS990/CYTotalExpensesAmt | 0 | 602663 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 37611 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 584850 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 8126 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 8126 |
| IRS990/Desc | 0 | TO MANAGE, OPERATE, DEVELOP, PROVIDE FOR, PRESERVE AND DEVOTE THE MANSION HOUSE, CARRIAGE HOUSE, GROUNDS AND OTHER BUILDINGS AND PROPERTIES LOCATED AT 6401 GERMANTOWN AVENUE, PHILADELPHIA, PENNSYLVANIA KNOWN AS CLIVEDEN (SITE OF 1777 REVOLUTIONARY WAR BATTLE OF GERMANTOWN) (15,789 VISITORS) |
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| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 69500 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 15 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | false |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 398151 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 10530 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 10530 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form1098CFiledInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form8899Filedind | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/FormerOfcrDirectorTrusteeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
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| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
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| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
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| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
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| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | BRIAN AMES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | GLENN BERGMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | JOAN COUNTRYMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | GARTH HERRICK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | ALAN KEISER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | VIOLETTE LEVY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | RANDALL MILLER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | THEODORE REED |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | BRAD ROEDER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | SERI WORDEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | AHSAN NASTRATULLAH |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
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| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | INTERIM TREA |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | CEO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | TREASURER |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormerOfcrEmployeesListedInd | 0 | true |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GainOrLossGrp/OtherAmt | 0 | 5861 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 2384 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 17 |
| IRS990/GovernmentGrantsAmt | 0 | 20039 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 5861 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 37500 |
| IRS990/GrossReceiptsAmt | 0 | 619966 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | true |
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| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
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| IRS990/InsuranceGrp/TotalAmt | 0 | 17393 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 3189 |
| IRS990/InterestGrp/TotalAmt | 0 | 3189 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 17856 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 17856 |
| IRS990/InvestmentInJointVentureInd | 0 | true |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 647405 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 676408 |
| IRS990/IRPDocumentCnt | 0 | 20 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 181122 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 207864 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 199739 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 380861 |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 35116 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | TO PRESERVE AND EDUCATE PEOPLE ABOUT THE HISTORIC BUILDINGS AND GROUNDS AT 6401 GERMANTOWN AVE., PHILADELPHIA, PA KNOWN AS CLIVEDEN (SITE OF 1777 REVOLUTIONARY WAR BATTLE OF GERMANTOWN) |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 809064 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 831652 |
| IRS990/NetGainOrLossInvestmentsGrp/RelatedOrExemptFuncIncomeAmt | 0 | 8245 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 8245 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 40401 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 809064 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 762152 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 3114 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 12457 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 15571 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 5499 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 9624 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 19247 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 34370 |
| IRS990/OtherExpensesGrp/Desc | 0 | BUILDING MAINTENANCE |
| IRS990/OtherExpensesGrp/Desc | 1 | UTILITIES |
| IRS990/OtherExpensesGrp/Desc | 2 | I&E RESEARCH |
| IRS990/OtherExpensesGrp/Desc | 3 | HSPV RESEARCH AND PLANNIN |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 16893 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 6543 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 67573 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 26171 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 28583 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 23164 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 84466 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 32714 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 28583 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 23164 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 25997 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 32254 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | OTHER REVENUE |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 258333 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 258333 |
| IRS990/OtherRevenueTotalAmt | 0 | 258333 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 27637 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 82912 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 165824 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 276373 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 3545 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 6202 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 12404 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 22151 |
| IRS990/PensionPlanContributionsGrp/FundraisingAmt | 0 | 930 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 1628 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 3255 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 5813 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 7062 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 8011 |
| IRS990/PrincipalOfficerNm | 0 | NANCY VAN DOLSEN |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | PROPERTY EVENT RENTALS |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | ADMISSIONS AND TOURS |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | INTERPRETATION AND EDUCATION |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 17355 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 10621 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 2 | 10197 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 17355 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 10621 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 2 | 10197 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 330313 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 16614 |
| IRS990/PYOtherExpensesAmt | 0 | 286623 |
| IRS990/PYOtherRevenueAmt | 0 | 244482 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 37232 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -40059 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 382077 |
| IRS990/PYTotalExpensesAmt | 0 | 668700 |
| IRS990/PYTotalRevenueAmt | 0 | 628641 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -17813 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 313264 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 1686 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 262243 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 574794 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 642949 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 373622 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 389658 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 2243266 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 17856 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 16614 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 14866 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 109569 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 16257 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 175162 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 296506 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.92760 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.87690 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 2243266 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 262243 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 574794 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 642949 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 373622 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 389658 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 2243266 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 2418428 |
| 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 | true |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 40746 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 40746 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 602663 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/LeaseholdImprovementsGrp/BookValueAmt | 0 | 199739 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/DepreciationAmt | 0 | 140376 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/OtherCostOrOtherBasisAmt | 0 | 340115 |
| IRS990ScheduleD/NetUnrealizedGainsInvstAmt | 0 | 40402 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 32254 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | UNIVEST LINE OF CREDIT |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 40402 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 584850 |
| IRS990ScheduleD/SolicitedAssetsSaleInd | 0 | false |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | F/S FOOTNOTE FOR ART, TREASURES, ETC. THE NATIONAL TRUST FOR HISTORIC PRESERVATION, INC OWNS THE WORKS OF ART AND HISTORICAL TREASURES. CLIVEDEN OF THE NATIONAL TRUST, INC. MAINTAINS THEM. THEY ARE HELD FOR PUBLIC EXHIBITION AND EDUCATION. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES PRESCRIBES A RECOGNITION THRESHOLD AND MEASUREMENT ATTRIBUTE FOR FINANCIAL STATEMENT RECOGNITION AND MEASUREMENT OF A TAX POSITION TAKEN OR EXPECTED TO BE TAKEN IN A TAX RETURN. FOR THOSE BENEFITS TO BE RECOGNIZED, A TAX POSITION MUST BE MORE- LIKELY-THAN-NOT TO BE SUSTAINED UPON EXAMINATION BY TAXING AUTHORITIES. FOR THE YEAR ENDED DECEMBER 31, 2024, THE ORGANIZATION HAS NO MATERIAL UNCERTAIN TAX POSITIONS. THE COMPANY RECOGNIZAED INTEREST AND PENALTIES, IF ANY, RELATED TO UNRECOGNIZED TAX BENEFITS IN INTEREST EXPENSE. THERE WERE NONE FOR THE YEAR ENDED DECEMBER 31, 2024. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | SCHEDULE D, PAGE 1, PART III, LINE 1A |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | SCHEDULE D, PAGE 3, PART X |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 199739 |
| IRS990ScheduleD/TotalExpensesPerForm990Amt | 0 | 602663 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 32254 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 584850 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 625252 |
| IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt | 0 | 602663 |
| IRS990ScheduleJ/AnyNonFixedPaymentsInd | 0 | false |
| IRS990ScheduleJ/CompBasedOnRevenueOfFlngOrgInd | 0 | false |
| IRS990ScheduleJ/CompBsdNetEarnsFlngOrgInd | 0 | false |
| IRS990ScheduleJ/CompBsdNetEarnsRltdOrgsInd | 0 | false |
| IRS990ScheduleJ/CompBsdOnRevRelatedOrgsInd | 0 | false |
| IRS990ScheduleJ/EquityBasedCompArrngmInd | 0 | false |
| IRS990ScheduleJ/InitialContractExceptionInd | 0 | false |
| IRS990/ScheduleJRequiredInd | 0 | true |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/PersonNm | 0 | AHSAN NASTRATULLAH |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TitleTxt | 0 | TREASURER |
| IRS990ScheduleJ/SeverancePaymentInd | 0 | false |
| IRS990ScheduleJ/SupplementalNonqualRtrPlanInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE DRAFT OF FORM 990 AND ATTACHED SCHEDULES WERE DELIVERED TO THE EXECUTIVE DIRECTOR, TREASURER, AUDIT COMMITTEE, AND THE BOARD OF DIRECTORS FOR THEIR REVIEW AND APPROVAL BEFORE FILING. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | IF ANY PERSON WITH KNOWLEDGE OF ANY RESTRICTED TRANSACTION OR ACTIVITY THA T MAY CONSTITUTE A POTENTIAL CONFLICT OF INTEREST SHALL PROMPTLY AND FULLY DISCLOSE THE TRANSACTION OR ACTIVITY TO THE CHAIRMAN OF THE BOARD OF DIRECTORS. IF THE CHAIR AFTER CONSULTATION WITH THE EXECUTIVE DIRECTOR, VICE CHAIR AND THE CHAIR OF THE GOVERANCE COMMITTEE, DETERMINES THAT A TRANSACTRANSACTION OR ACTIVITY APPEARS TO BE A CONFLICT THEN THE CHAIR MAY (1)REJECT THE PROPSED TRANSACTION OR ACTIVITY; (2)CONDITION THE PROPOSED TRANSACTION OR ACTIVITY TO ELIMINATE THE POTENTIAL CONFLICT; OR (3) REFER THE MATTER TO THE EXECUTIVE COMMITTEE TO AUTHORIZE THE TRANSACTION OR ACTIVITY AFTER FULL DISCLOSURE AND DETAILED REVIEW. THE EXECUTIVE COMMITTEE MAY AUTHORIZE THE TRANSACTION OR ALLOW THE PROPOSED CONFLICTING ACTIVITY AFTER FULL DISCLOSURE AND DETAILED REVIEW. THE TRANSACTION OR ACTIVITY MAY PROCEED IF APPROVED BY A MAJORITY OF THE MEMBERS OF THE EXECUTIVE COMMITTEE. IF APPROVED, THE TRANSACTION OR ACTIVITY SHALL BE REPORTED TO THE FULL BOARD AT THE NEXT REGULARLY SCHEDULED MEETING OF THE BOARD. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | THE ORGANIZATION'S GOVERNING DOCUMENTS, POLICIES AND FINANCIAL STATMENTS A RE AVAILABLE TO THE PUBLIC. INQUIRES MAY BE MADE OF THE OFFICERS AND BOARD OF DIRECTORS. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PAGE 6, PART VI, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PAGE 6, PART VI, LINE 12C |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PAGE 6, PART VI, LINE 19 |
| IRS990/SchoolOperatingInd | 0 | false |
| IRS990/SignificantChangeInd | 0 | false |
| IRS990/SignificantNewProgramSrvcInd | 0 | false |
| IRS990/StatesWhereCopyOfReturnIsFldCd | 0 | PA |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | false |
| IRS990/SubjectToProxyTaxInd | 0 | false |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | false |
| IRS990/TaxablePartyNotificationInd | 0 | false |
| IRS990/TaxExemptBondsInd | 0 | false |
| IRS990/TerminateOperationsInd | 0 | false |
| IRS990/TotalAssetsBOYAmt | 0 | 866567 |
| IRS990/TotalAssetsEOYAmt | 0 | 894724 |
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