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        <DepreciationAmt>3775919</DepreciationAmt>
        <BookValueAmt>65946</BookValueAmt>
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      <LeaseholdImprovementsGrp>
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        <DepreciationAmt>256232</DepreciationAmt>
        <BookValueAmt>56694</BookValueAmt>
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        <DepreciationAmt>140001</DepreciationAmt>
        <BookValueAmt>8010</BookValueAmt>
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      <TotalBookValueLandBuildingsAmt>293217</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>DUE TO KATONAH MUSEUM ARTIST ASSOCIATION</Desc>
        <Amt>31991</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>LEASE LIABILITY</Desc>
        <Amt>36195</Amt>
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      <TotalLiabilityAmt>68186</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
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      <NetUnrealizedGainsInvstAmt>194540</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>194540</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>1654475</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>33615</InvestmentExpensesNotIncldAmt>
      <RevenueNotReportedFinclStmtAmt>33615</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>1688090</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>2038962</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>2038962</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>33615</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>33615</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>2072577</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>INCOME GENERATED FROM THE PERMANENTLY RESTRICTED NET ASSETS IS AVAILABLE TO SUPPORT SPECIAL PROGRAMS, EXHIBITIONS, GENERAL OPERATIONS, AND EDUCATION ACTIVITIES OF THE ORGANIZATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MUSEUM RECOGNIZES THE EFFECT OF INCOME TAX POSITIONS ONLY IF THOSE POSITIONS ARE MORE LIKELY THAN NOT TO BE SUSTAINED. MANAGEMENT HAS DETERMINED THAT THE MUSEUM HAD NO UNCERTAIN TAX POSITIONS THAT WOULD REQUIRE FINANCIAL STATEMENT RECOGNITION OR DISCLOSURE. THE MUSEUM IS NO LONGER SUBJECT TO EXAMINATIONS BY THE APPLICABLE TAXING JURISDICTIONS FOR PERIODS PRIOR TO FISCAL 2022.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleG documentId="RetDoc1041200001">
      <MailSolicitationsInd>X</MailSolicitationsInd>
      <EmailSolicitationsInd>X</EmailSolicitationsInd>
      <PhoneSolicitationsInd>X</PhoneSolicitationsInd>
      <InPersonSolicitationsInd>X</InPersonSolicitationsInd>
      <SolicitationOfNonGovtGrantsInd>X</SolicitationOfNonGovtGrantsInd>
      <SolicitationOfGovtGrantsInd>X</SolicitationOfGovtGrantsInd>
      <SpecialFundraisingEventsInd>X</SpecialFundraisingEventsInd>
      <AgrmtProfFundraisingActyInd>1</AgrmtProfFundraisingActyInd>
      <FundraiserActivityInfoGrp>
        <PersonNm>GIOVANNA URST</PersonNm>
        <USAddress>
          <AddressLine1Txt>34 LINCKLAEN STREET</AddressLine1Txt>
          <CityNm>CAZENOVIA</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>13035</ZIPCd>
        </USAddress>
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        <GrossReceiptsAmt>0</GrossReceiptsAmt>
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        <NetToOrganizationAmt>-29408</NetToOrganizationAmt>
      </FundraiserActivityInfoGrp>
      <FundraiserActivityInfoGrp>
        <PersonNm>JESSIE BOHONNON</PersonNm>
        <USAddress>
          <AddressLine1Txt>241 WEAVER STREET 12F</AddressLine1Txt>
          <CityNm>GREENWICH</CityNm>
          <StateAbbreviationCd>CT</StateAbbreviationCd>
          <ZIPCd>06831</ZIPCd>
        </USAddress>
        <ActivityTxt>FUNDRAISING COUNSEL</ActivityTxt>
        <FundraiserControlOfFundsInd>0</FundraiserControlOfFundsInd>
        <GrossReceiptsAmt>0</GrossReceiptsAmt>
        <RetainedByContractorAmt>21325</RetainedByContractorAmt>
        <NetToOrganizationAmt>-21325</NetToOrganizationAmt>
      </FundraiserActivityInfoGrp>
      <TotalRetainedByContractorsAmt>50733</TotalRetainedByContractorsAmt>
      <TotalNetToOrganizationAmt>-50733</TotalNetToOrganizationAmt>
      <LicensedStatesCd>NY</LicensedStatesCd>
      <FundraisingEventInformationGrp>
        <Event1Nm>GALA</Event1Nm>
        <GrossReceiptsEvent1Amt>403691</GrossReceiptsEvent1Amt>
        <CharitableContriEvent1Amt>330096</CharitableContriEvent1Amt>
        <GrossRevenueEvent1Amt>73595</GrossRevenueEvent1Amt>
        <NonCashPrizesEvent1Amt>350</NonCashPrizesEvent1Amt>
        <RentFacilityCostsEvent1Amt>36812</RentFacilityCostsEvent1Amt>
        <FoodAndBeverageEvent1Amt>80710</FoodAndBeverageEvent1Amt>
        <EntertainmentEvent1Amt>17697</EntertainmentEvent1Amt>
        <OtherDirectExpensesEvent1Amt>33427</OtherDirectExpensesEvent1Amt>
        <Event2Nm>HIMMEL AWARD</Event2Nm>
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        <CharitableContriEvent2Amt>68897</CharitableContriEvent2Amt>
        <GrossRevenueEvent2Amt>9434</GrossRevenueEvent2Amt>
        <CashPrizesEvent2Amt>10000</CashPrizesEvent2Amt>
        <NonCashPrizesEvent2Amt>186</NonCashPrizesEvent2Amt>
        <RentFacilityCostsEvent2Amt>6150</RentFacilityCostsEvent2Amt>
        <FoodAndBeverageEvent2Amt>14850</FoodAndBeverageEvent2Amt>
        <OtherDirectExpensesEvent2Amt>4864</OtherDirectExpensesEvent2Amt>
        <GrossReceiptsTotalAmt>482022</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>398993</CharitableContributionsTotAmt>
        <GrossRevenueTotalEventsAmt>83029</GrossRevenueTotalEventsAmt>
        <CashPrizesTotalEventsAmt>10000</CashPrizesTotalEventsAmt>
        <NonCashPrizesTotalEventsAmt>536</NonCashPrizesTotalEventsAmt>
        <RentFcltyCostsTotalEventsAmt>42962</RentFcltyCostsTotalEventsAmt>
        <FoodAndBeverageTotalEventsAmt>95560</FoodAndBeverageTotalEventsAmt>
        <EntertainmentTotalEventsAmt>17697</EntertainmentTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>38291</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>205046</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>-122017</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE G, PART I, LINE 2B, COLUMN (V)</FormAndLineReferenceDesc>
        <ExplanationTxt>THE AGREEMENT WITH JESSIE BOHONNON PROVIDES FOR THE PAYMENT OF FUNDRAISING COUNSEL SERVICES AT A RATE OF $50 PER HOUR WITH AN AVERAGE OF 40 HOURS PER MONTH.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleG>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <CompensationCommitteeInd>X</CompensationCommitteeInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
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      <RltdOrgOfficerTrstKeyEmplGrp>
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        <TitleTxt>&amp; CHIEF CURATOR (ED THRU JAN 2025)</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
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        <DeferredCompensationFlngOrgAmt>7950</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>62117</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>303184</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <WorksOfArtGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>10</ContributionCnt>
        <NoncashContributionsRptF990Amt>233200</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>OPINIONS OF EXPERTS</MethodOfDeterminingRevenuesTxt>
      </WorksOfArtGrp>
      <BooksAndPublicationsGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <NoncashContributionsRptF990Amt>675</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>COST</MethodOfDeterminingRevenuesTxt>
      </BooksAndPublicationsGrp>
      <ClothingAndHouseholdGoodsGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <NoncashContributionsRptF990Amt>3831</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>COST</MethodOfDeterminingRevenuesTxt>
      </ClothingAndHouseholdGoodsGrp>
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>16971</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>AVG. SELLLING PRICE</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <FoodInventoryGrp>
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        <ContributionCnt>6</ContributionCnt>
        <NoncashContributionsRptF990Amt>3368</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>COST</MethodOfDeterminingRevenuesTxt>
      </FoodInventoryGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>FLORAL CENTERPIECES</Desc>
        <ContributionCnt>3</ContributionCnt>
        <NoncashContributionsRptF990Amt>10174</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>COST</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>MUSICAL INSTRUMENTS</Desc>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>5000</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>COST</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>ELECTRONICS</Desc>
        <ContributionCnt>3</ContributionCnt>
        <NoncashContributionsRptF990Amt>1580</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>COST</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <Form8283ReceivedCnt>0</Form8283ReceivedCnt>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>0</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, COLUMN (B):</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION IS REPORTING THE NUMBER OF CONTRIBUTORS IN PART I, COLUMN (B).</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE 990 IS PREPARED BY AN OUTSIDE TAX PREPARER WITH THE ASSISTANCE OF MEMBERS OF THE ORGANIZATION. ONCE A DRAFT IS COMPLETED, A PDF VERSION OF THE FORM 990 IS DISTRIBUTED VIA EMAIL TO EACH OFFICER AND DIRECTOR BEFORE THE FORM 990 IS FILED WITH THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>KATONAH MUSEUM OF ART CURRENTLY HAS IN PLACE A CONFLICT OF INTEREST POLICY WHICH IT ANNUALLY MONITORS AND ENFORCES. THE BOARD CURRENTLY MANDATES THAT ALL DIRECTORS, OFFICERS, AND KEY EMPLOYEES ANNUALLY SIGN A CONFLICT OF INTEREST POLICY AND DISCLOSE ANY POTENTIAL OR ACTUAL CONFLICTS THAT MAY EXIST. THE SIGNED CONFLICT OF INTEREST POLICY IS SUBMITTED TO THE BOARD SECRETARY WHO REVIEWS THE SIGNED ATTESTATIONS FOR POTENTIAL OR ACTUAL CONFLICTS. IF A POTENTIAL OR ACTUAL CONFLICT EXISTS, THE BOARD OR COMMITTEE WILL INFORM THE MEMBER OF THE BASIS OF SUCH BELIEF AND AFFORD THE MEMBER AN OPPORTUNITY TO RESPOND. THE BOARD OR COMMITTEE WILL DISCLOSE THE CONFLICT OF INTEREST AND HOW THE CONFLICT WAS HANDLED. THE PERSON WITH THE ACTUAL CONFLICT OF INTEREST WILL BE PROHIBITED FROM VOTING ON THE MATTER THAT GIVES RISE TO THE CONFLICT. IF THERE HAS BEEN SUBSTANTIAL AND REPEATED FAILURES TO DISCLOSE ACTUAL CONFLICTS OF INTEREST, THE BOARD MAY TAKE APPROPRIATE DISCIPLINARY AND CORRECTIVE ACTION, INCLUDING REMOVAL OF THE MEMBER.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE COMMITTEE SERVES AS THE COMPENSATION COMMITTEE AND UNDERTAKES COMPARATIVE SALARY REVIEWS FOR THE EXECUTIVE DIRECTOR. THE PROCESS FOR DETERMINING THE EXECUTIVE DIRECTOR'S COMPENSATION IS DETERMINED USING DATA FROM THAT OF COMPARABLE ORGANIZATIONS. THE PROCESS LAST OCCURRED IN 2024 AND WAS DOCUMENTED IN THE MINUTES OF THE ORGANIZATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>