Liabilities / Assets
19th percentile
Higher debt load relative to assets than 19% of similar nonprofits.
Mather Homestead Foundation Inc.
EIN 47-5555968 • 501(c)3 • Darien, CT
Pub. 78 Eligible990-N Coverage
Profile
The mather homestead foundation is dedicated to the preservation of the mather homestead in order to educate the community about revolutionary times, eighteenth and nineteenth century living, and stephen mather's legacy as an important conservationist and the founder of our modern national parks system.
Siviq Scores
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
0.01x
Liabilities / Revenue
42nd percentile
Higher debt load relative to revenue than 42% of similar nonprofits.
Net Margin
55th percentile
Higher net margin than 55% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
40th percentile
Faster asset growth than 40% of similar nonprofits.
Revenue Growth
62nd percentile
Faster revenue growth than 62% of similar nonprofits.
Balance Sheet
Assets
Up$5,098,281
Up $86,839 (+1.7%) from 2023
Liabilities
Down$44,901
Down $4,470 (-9.1%) from 2023
Net Assets
Up$5,053,380
Up $91,309 (+1.8%) from 2023
Revenue
Up$405,070
Up $47,563 (+13%) from 2023
Expenses
Down$376,934
Down $37,580 (-9.1%) from 2023
Net Income
Up$28,136
Up $85,143 (+149%) from 2023
Trend Graphs
Filings
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
- Assets
- $5,098,281
- Liabilities
- $44,901
- Net assets
- $5,053,380
- Revenue
- $405,070
- Expenses
- $376,934
- Net income
- $28,136
Latest Filing Detail
Jump To
Filing Snapshot
- Filing Period
- Jan 1, 2024 to Dec 31, 2024
- Signed
- Oct 1, 2025
- Return Version
- 2024v5.2
- Gross Receipts
- $499,627
Mission and Program Overview
Mission
The mather homestead foundation is dedicated to the preservation of the mather homestead in order to educate the community about revolutionary times, eighteenth and nineteenth century living, and stephen mather's legacy as an important conservationist and the founder of our modern national parks system.
Preservation of the mather homestead as a museum for the education of the public.
Balance Sheet Detail
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Rtn Earn Endowment Incm Other Fnds | $4,962,071 | $5,053,380 | ▲ $91,309 |
| Land, Buildings, and Equipment, Net | $623,839 | $698,089 | ▲ $74,250 |
| Investments in Publicly Traded Securities | $242,238 | $259,300 | ▲ $17,062 |
| Cash and Non-Interest-Bearing Accounts | $260,691 | $215,901 | ▼ $44,790 |
| Savings and Temporary Cash Investments | - | $46,441 | - |
| Pledges and Grants Receivable | $15,562 | $10,500 | ▼ $5,062 |
| Prepaid Expenses and Deferred Charges | $1,062 | - | - |
| Pd in Cap Srpls Land Bldg Eqp Fund | $0 | $0 | → $0 |
| Cap Stk Tr Prin Current Funds | $0 | $0 | → $0 |
| Total Assets | $5,011,442 | $5,098,281 | ▲ $86,839 |
| Other Assets Total | $3,868,050 | $3,868,050 | → $0 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $22,471 | $35,708 | ▲ $13,237 |
| Deferred Revenue | $25,500 | $7,885 | ▼ $17,615 |
| Other Liabilities | $1,400 | $1,308 | ▼ $92 |
| Total Liabilities | $49,371 | $44,901 | ▼ $4,470 |
| Net Assets / Fund Balance | |||
| Total Net Assets Fund Balance | $4,962,071 | $5,053,380 | ▲ $91,309 |
| Total Liabilities and Net Assets / Fund Balance | $5,011,442 | $5,098,281 | ▲ $86,839 |
Asset Categories
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $556,454 | $67,539 | $623,993 |
| Land | $125,000 | - | $125,000 |
| Equipment | $8,971 | $9,782 | $18,753 |
| Leasehold Improvements | $7,664 | $1,369 | $9,033 |
| Other Assets Org | $298,050 | - | - |
Compensation and Service Providers
Board Members and Trustees
| Name | Title |
|---|---|
| Richard L Chilton | Chairman |
| Ania Janis | Board Member |
| Ginger Morgan | Board Member |
| Joellyn Gray | Board Member |
| John Sini | Board Member |
| Kelly Stewart | Board Member |
| Mathew Dougherty | Board Member |
| Penny Rashin | Board Member |
| Ron Lamorte | Board Member |
| Sally Houlihan | Board Member |
| Sarah Nickerson | Board Member |
| Tammy Sload | Board Member |
| Tiffany Van Elslander | Board Member |
| Jennifer Foster | Treasurer |
Revenue and Support
Revenue Composition
- Contributions and Grants
- $295,644
- Program Service Revenue
- $0
- Investment Income
- $6,589
- Other Revenue
- $102,837
- All Other Contributions
- $261,044
- Change in Net Assets
- $28,136
Expenses and Functional Allocation
Major Expense Lines
| Line Item | Amount |
|---|---|
| Other Expenses | $271,654 |
| Salaries, Compensation, and Employee Benefits | $105,280 |
| Total Fundraising Expense | $26,479 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
Functional Expense Allocation
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $77,848 | $9,731 | $9,731 | $97,310 |
| All Other Expenses | $57,369 | $7,144 | $6,533 | $71,046 |
| Fees for Services Other | - | $51,460 | - | $51,460 |
| Depreciation Depletion | $21,788 | - | - | $21,788 |
| Other Expenses | $14,747 | - | - | $14,747 |
| Insurance | $12,600 | - | - | $12,600 |
| Advertising | - | - | $9,418 | $9,418 |
| Fees for Services Accounting | - | $8,966 | - | $8,966 |
| Payroll Taxes | $6,376 | $797 | $797 | $7,970 |
| Fees for Services Legal | - | $188 | - | $188 |
| Total Functional Expenses | $272,169 | $78,286 | $26,479 | $376,934 |
Fundraising, Events, and Gaming
- Fundraising activities
- Yes
- Gaming activities
- No
- Professional fundraiser used
- No
Fundraising and Gaming Totals
| Line Item | Amount |
|---|---|
| Fundraising Gross Income | $178,106 |
| Fundraising Direct Expenses | $94,557 |
| Professional Fundraising Fees | $0 |
Fundraising Events
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| Tea in the Garden | $51,077 | $51,077 | $10,601 | $40,476 |
| Yoga | $15,105 | $15,105 | $7,340 | $7,765 |
| Total Events | $178,106 | $178,106 | $94,557 | $83,549 |
Political and Lobbying Activity
- Political campaign activity
- No
- Lobbying activity
- No
- Subject to proxy tax
- No
Debt and Bond Financing
Other Reported Liabilities
| Liability | Amount |
|---|---|
| Rent Deposit | $1,308 |
Governance and Compliance
Governance Checklist
- Compiled or reviewed by an accountant
- No
- Annual disclosure for covered persons
- 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
“Form 990 is provided to each of the board members for review prior to filing.”
Form 990, Part VI, Section B, Line 12C
“Each director provides information required to determine independence/conflicts of interest on an annual basis.”
Form 990, Part VI, Section C, Line 19
“The organization makes these forms available upon request.”
Filing and Contact Details
Filer
- Filer Name
- Mather Homestead Foundation
- EIN
- 47-5555968
- Phone
- 2032022941
- Address
- 19 STEPHEN MATHER RD, DARIEN, CT 06820
Signing Officer
- Name
- Richard L Chilton
- Title
- Chairman
- Phone
- 2032022941
- Signed
- 2025-10-01
- Discuss with paid preparer
- Yes
Organization Details
- Principal Officer
- Richard L Chilton
- Formed
- 2015
- Legal Domicile
- Ct
- Voting Board Members
- 15
- Independent Board Members
- 15
- Employees
- 2
- Volunteers
- 50
Preparer
- Firm
- Rolleri & Sheppard Cpas Llp
- Address
- 2150 POST ROAD 5TH FL, FAIRFIELD, CT 06824
- Preparer
- John M Rolleri CPA
- Phone
- 2032592727
Supplemental Narrative
Additional Explanations
Form 990, Part IX, Line 11G
“Outside contract services: program service expenses 0. Management and general expenses 15,828. Fundraising expenses 0. Total expenses 15,828. Architecture/planning/survey: program service expenses 0. Management and general expenses 13,250. Fundraising expenses 0. Total expenses 13,250. Cultural landscape report: program service expenses 0. Management and general expenses 22,382. Fundraising expenses 0. Total expenses 22,382.”
Form 990, Part IX, Line 24E
“Utilities: program service expenses 13,155. Management and general expenses 0. Fundraising expenses 0. Total expenses 13,155. Stephen mather exhibition: program service expenses 12,718. Management and general expenses 0. Fundraising expenses 0. Total expenses 12,718. Credit card processing: program service expenses 8,819. Management and general expenses 0. Fundraising expenses 0. Total expenses 8,819. Supplies: program service expenses 8,771. Management and general expenses 0. Fundraising expenses 0. Total expenses 8,771. Curatorial: program service expenses 8,388. Management and general expenses 0. Fundraising expenses 0. Total expenses 8,388. Annual expense: program service expenses 0. Management and general expenses 0. Fundraising expenses 6,047. Total expenses 6,047. Books, subscriptions, reference: program service expenses 0. Management and general expenses 4,360. Fundraising expenses 0. Total expenses 4,360. Telephone & internet: program service expenses 3,863. Management and general expenses 0. Fundraising expenses 0. Total expenses 3,863. Postage: program service expenses 0. Management and general expenses 1,382. Fundraising expenses 0. Total expenses 1,382. Book store expenses: program service expenses 1,089. Management and general expenses 0. Fundraising expenses 0. Total expenses 1,089. Meetings: program service expenses 0. Management and general expenses 676. Fundraising expenses 0. Total expenses 676. Donor database: program service expenses 0. Management and general expenses 0. Fundraising expenses 486. Total expenses 486. Summer interns: program service expenses 0. Management and general expenses 435. Fundraising expenses 0. Total expenses 435. Printing & copying: program service expenses 0. Management and general expenses 291. Fundraising expenses 0. Total expenses 291. Bank fees: program service expenses 223. Management and general expenses 0. Fundraising expenses 0. Total expenses 223. Payroll processing: program service expenses 213. Management and general expenses 0. Fundraising expenses 0. Total expenses 213. Business registration fees: program service expenses 100. Management and general expenses 0. Fundraising expenses 0. Total expenses 100. Playhouse restoration: program service expenses 30. Management and general expenses 0. Fundraising expenses 0. Total expenses 30.”
Part XI, Line 8
“The organization revised its 2023 information and determined that previously expanded items should have been capitalized.”
Financial Statement Notes
PART III, LINE 4:
“The mather homestead's collections include antiques, paintings and artifacts collected by the mather family since the homestead was built in 1778 by joseph mather, an important patriot during the revolutionary war. During the early 20th century, the home was owned by stephen tyng mather, known to be the founder of our modern national park systems. The collection includes many artifacts about his life and work.”
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| IRS990/Desc | 0 | THE MATHER HOMESTEAD FOUNDATION IS DEDICATED TO THE PRESERVATION OF THE MATHER HOMESTEAD IN ORDER TO EDUCATE THE COMMUNITY ABOUT REVOLUTIONARY TIMES, EIGHTEENTH AND NINETEENTH CENTURY LIVING, AND STEPHEN MATHER'S LEGACY AS AN IMPORTANT CONSERVATIONIST AND THE FOUNDER OF OUR MODERN NATIONAL PARKS SYSTEM. |
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| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | BOARD MEMBER |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 2015 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 1 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 94557 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 178106 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 15 |
| IRS990/GovernmentGrantsAmt | 0 | 28500 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 499627 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 18005 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 15 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartIXInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 12600 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 12600 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 6589 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 6589 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 242238 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 259300 |
| IRS990/IRPDocumentCnt | 0 | 17 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 78690 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 623839 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 698089 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 776779 |
| IRS990/LegalDomicileStateCd | 0 | CT |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 0 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembershipDuesAmt | 0 | 6100 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | THE MATHER HOMESTEAD FOUNDATION IS DEDICATED TO THE PRESERVATION OF THE MATHER HOMESTEAD IN ORDER TO EDUCATE THE COMMUNITY ABOUT REVOLUTIONARY TIMES, EIGHTEENTH AND NINETEENTH CENTURY LIVING, AND STEPHEN MATHER'S LEGACY AS AN IMPORTANT CONSERVATIONIST AND THE FOUNDER OF OUR MODERN NATIONAL PARKS SYSTEM. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 4962071 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 5053380 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | 83549 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 83549 |
| IRS990/NetRentalIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 18005 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 18005 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 31854 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrgDoesNotFollowFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 3868050 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 3868050 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | LANDSCAPING AND LAWN CA |
| IRS990/OtherExpensesGrp/Desc | 1 | BEAUTIFICATION |
| IRS990/OtherExpensesGrp/Desc | 2 | MAINTENANCE AND EQUIP R |
| IRS990/OtherExpensesGrp/Desc | 3 | HOUSE RESTORATION |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 39831 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 21824 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 19786 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 14747 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 39831 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 21824 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 19786 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 14747 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 1400 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 1308 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 999999 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | OTHER INCOME |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 1283 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 1283 |
| IRS990/OtherRevenueTotalAmt | 0 | 1283 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 9731 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 9731 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 77848 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 97310 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 797 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 797 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 6376 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 7970 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/BOYAmt | 0 | 0 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/EOYAmt | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 15562 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 10500 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 1062 |
| IRS990/PrincipalOfficerNm | 0 | RICHARD L CHILTON |
| IRS990/PriorPeriodAdjustmentsAmt | 0 | 31319 |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | PERENNIAL MAINTENANCE PROGRAM TO PRESERVE THE MATHER HOMESTEAD. |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 109374 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 277680 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 4063 |
| IRS990/PYOtherExpensesAmt | 0 | 320366 |
| IRS990/PYOtherRevenueAmt | 0 | 75764 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -57007 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 94148 |
| IRS990/PYTotalExpensesAmt | 0 | 414514 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 357507 |
| IRS990/QuidProQuoContributionsInd | 0 | 1 |
| IRS990/QuidProQuoContriDisclInd | 0 | 1 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 28136 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | 18005 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 1 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 1 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt | 0 | 4962071 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt | 0 | 5053380 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 46441 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 464538 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 393139 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 374648 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 542690 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 450481 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 2225496 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 6589 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 4062 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 3484 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1528 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 563 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 16226 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.99280 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.89760 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 2225496 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 464538 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 393139 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 374648 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 542690 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 450481 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 2225496 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 2241722 |
| 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 | 556454 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 67539 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 623993 |
| IRS990ScheduleD/CollectionUsedPreservationInd | 0 | X |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 8971 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 9782 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 18753 |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 125000 |
| IRS990ScheduleD/LandGrp/OtherCostOrOtherBasisAmt | 0 | 125000 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/BookValueAmt | 0 | 7664 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/DepreciationAmt | 0 | 1369 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/OtherCostOrOtherBasisAmt | 0 | 9033 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 0 | 3570000 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 1 | 298050 |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 0 | MATHER HOMESTEAD - LAND & BUILDINGS - COLLECTIONS |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 1 | MATHER HOMESTEAD - PERSONAL PROPERTY - COLLECTIONS |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 1308 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | RENT DEPOSIT |
| IRS990ScheduleD/SolicitedAssetsSaleInd | 0 | 0 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | THE MATHER HOMESTEAD'S COLLECTIONS INCLUDE ANTIQUES, PAINTINGS AND ARTIFACTS COLLECTED BY THE MATHER FAMILY SINCE THE HOMESTEAD WAS BUILT IN 1778 BY JOSEPH MATHER, AN IMPORTANT PATRIOT DURING THE REVOLUTIONARY WAR. DURING THE EARLY 20TH CENTURY, THE HOME WAS OWNED BY STEPHEN TYNG MATHER, KNOWN TO BE THE FOUNDER OF OUR MODERN NATIONAL PARK SYSTEMS. THE COLLECTION INCLUDES MANY ARTIFACTS ABOUT HIS LIFE AND WORK. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART III, LINE 4: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 698089 |
| IRS990ScheduleD/TotalBookValueOtherAssetsAmt | 0 | 3868050 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 1308 |
| IRS990ScheduleG/FundraisingEventInformationGrp/DirectExpenseSummaryEventsAmt | 0 | 94557 |
| IRS990ScheduleG/FundraisingEventInformationGrp/Event1Nm | 0 | TEA IN THE GARDEN |
| IRS990ScheduleG/FundraisingEventInformationGrp/Event2Nm | 0 | YOGA |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent1Amt | 0 | 51077 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent2Amt | 0 | 15105 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsOtherEventsAmt | 0 | 111924 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsTotalAmt | 0 | 178106 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueEvent1Amt | 0 | 51077 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueEvent2Amt | 0 | 15105 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueOtherEventsAmt | 0 | 111924 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueTotalEventsAmt | 0 | 178106 |
| IRS990ScheduleG/FundraisingEventInformationGrp/NetIncomeSummaryAmt | 0 | 83549 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OthDirectExpnssOtherEventsAmt | 0 | 76616 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OthDirectExpnssTotalEventsAmt | 0 | 94557 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherDirectExpensesEvent1Amt | 0 | 10601 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherDirectExpensesEvent2Amt | 0 | 7340 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherEventsTotalCnt | 0 | 13 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | FORM 990 IS PROVIDED TO EACH OF THE BOARD MEMBERS FOR REVIEW PRIOR TO FILING. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | EACH DIRECTOR PROVIDES INFORMATION REQUIRED TO DETERMINE INDEPENDENCE/CONFLICTS OF INTEREST ON AN ANNUAL BASIS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | THE ORGANIZATION MAKES THESE FORMS AVAILABLE UPON REQUEST. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | OUTSIDE CONTRACT SERVICES: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 15,828. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 15,828. ARCHITECTURE/PLANNING/SURVEY: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 13,250. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 13,250. CULTURAL LANDSCAPE REPORT: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 22,382. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 22,382. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | UTILITIES: PROGRAM SERVICE EXPENSES 13,155. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 13,155. STEPHEN MATHER EXHIBITION: PROGRAM SERVICE EXPENSES 12,718. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 12,718. CREDIT CARD PROCESSING: PROGRAM SERVICE EXPENSES 8,819. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 8,819. SUPPLIES: PROGRAM SERVICE EXPENSES 8,771. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 8,771. CURATORIAL: PROGRAM SERVICE EXPENSES 8,388. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 8,388. ANNUAL EXPENSE: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 6,047. TOTAL EXPENSES 6,047. BOOKS, SUBSCRIPTIONS, REFERENCE: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 4,360. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 4,360. TELEPHONE & INTERNET: PROGRAM SERVICE EXPENSES 3,863. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 3,863. POSTAGE: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 1,382. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 1,382. BOOK STORE EXPENSES: PROGRAM SERVICE EXPENSES 1,089. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 1,089. MEETINGS: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 676. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 676. DONOR DATABASE: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 486. TOTAL EXPENSES 486. SUMMER INTERNS: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 435. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 435. PRINTING & COPYING: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 291. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 291. BANK FEES: PROGRAM SERVICE EXPENSES 223. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 223. PAYROLL PROCESSING: PROGRAM SERVICE EXPENSES 213. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 213. BUSINESS REGISTRATION FEES: PROGRAM SERVICE EXPENSES 100. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 100. PLAYHOUSE RESTORATION: PROGRAM SERVICE EXPENSES 30. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 30. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 5 | THE ORGANIZATION REVISED ITS 2023 INFORMATION AND DETERMINED THAT PREVIOUSLY EXPANDED ITEMS SHOULD HAVE BEEN CAPITALIZED. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION B, LINE 12C |
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