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        <ManagementAndGeneralAmt>8583</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>15850</ManagementAndGeneralAmt>
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      <FeesForSrvcInvstMgmntFeesGrp>
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      <InterestGrp>
        <TotalAmt>9482</TotalAmt>
        <ManagementAndGeneralAmt>9482</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>461673</ProgramServicesAmt>
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      <InsuranceGrp>
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        <ManagementAndGeneralAmt>105821</ManagementAndGeneralAmt>
        <FundraisingAmt>61</FundraisingAmt>
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      <OtherExpensesGrp>
        <Desc>COLES HOUSE PASS THROUG</Desc>
        <TotalAmt>200000</TotalAmt>
        <ManagementAndGeneralAmt>200000</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>REPAIRS AND MAINTENANCE</Desc>
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        <ProgramServicesAmt>54661</ProgramServicesAmt>
        <ManagementAndGeneralAmt>102375</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>VOLUNTEER AND BOARD ACT</Desc>
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        <ProgramServicesAmt>12</ProgramServicesAmt>
        <ManagementAndGeneralAmt>11996</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>OUTSIDE SERVICES</Desc>
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        <ProgramServicesAmt>3520</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3900</ManagementAndGeneralAmt>
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      <AllOtherExpensesGrp>
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        <ManagementAndGeneralAmt>4001</ManagementAndGeneralAmt>
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      <TotalFunctionalExpensesGrp>
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        <ProgramServicesAmt>1917776</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1243326</ManagementAndGeneralAmt>
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        <EOYAmt>29020</EOYAmt>
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        <EOYAmt>391480</EOYAmt>
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      <PledgesAndGrantsReceivableGrp>
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        <EOYAmt>251485</EOYAmt>
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      <InventoriesForSaleOrUseGrp>
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        <EOYAmt>179879</EOYAmt>
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        <EOYAmt>93210</EOYAmt>
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      <LandBldgEquipCostOrOtherBssAmt>51644953</LandBldgEquipCostOrOtherBssAmt>
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        <EOYAmt>44974287</EOYAmt>
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        <EOYAmt>2907593</EOYAmt>
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        <EOYAmt>153407</EOYAmt>
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        <EOYAmt>252525</EOYAmt>
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      <MortgNotesPyblScrdInvstPropGrp>
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        <EOYAmt>139194</EOYAmt>
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        <EOYAmt>545126</EOYAmt>
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        <EOYAmt>45021447</EOYAmt>
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      <DonorRestrictionNetAssetsGrp>
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        <EOYAmt>3260381</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>48835222</BOYAmt>
        <EOYAmt>48281828</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
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        <EOYAmt>48826954</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>-870210</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>316816</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
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    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
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        <CurrentTaxYearMinus3YearsAmt>1411248</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>829041</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1363262</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>1087228</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus2YearsAmt>829041</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1363262</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>1087228</CurrentTaxYearAmt>
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      <GrossInvestmentIncome170Grp>
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        <CurrentTaxYearMinus3YearsAmt>2921</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>28935</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>77010</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>117557</CurrentTaxYearAmt>
        <TotalAmt>417860</TotalAmt>
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      <TotalSupportAmt>7700496</TotalSupportAmt>
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      <PublicSupportPY170Pct>0.95150</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
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    <IRS990ScheduleB documentId="RetDoc1234500001">
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        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
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          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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        <EndYearBalanceAmt>2991358</EndYearBalanceAmt>
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        <EndYearBalanceAmt>2592689</EndYearBalanceAmt>
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        <EndYearBalanceAmt>2493006</EndYearBalanceAmt>
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        <InvestmentEarningsOrLossesAmt>117284</InvestmentEarningsOrLossesAmt>
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        <EndYearBalanceAmt>2249562</EndYearBalanceAmt>
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        <InvestmentEarningsOrLossesAmt>260381</InvestmentEarningsOrLossesAmt>
        <EndYearBalanceAmt>1922055</EndYearBalanceAmt>
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        <BookValueAmt>494709</BookValueAmt>
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      <BuildingsGrp>
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        <BookValueAmt>44297333</BookValueAmt>
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      <LeaseholdImprovementsGrp>
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        <MethodValuationCd>F</MethodValuationCd>
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      <OtherSecuritiesGrp>
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        <MethodValuationCd>F</MethodValuationCd>
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      <NetUnrealizedGainsInvstAmt>316816</NetUnrealizedGainsInvstAmt>
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      <RevenueNotReportedAmt>383053</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>2511772</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>2511772</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>3448219</TotExpnsEtcAuditedFinclStmtAmt>
      <OtherExpensesIncludedAmt>66237</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>66237</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>3381982</ExpensesSubtotalAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>SPECIAL EVENTS EXPENSES</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>SPECIAL EVENTS EXPENSE</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 3A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COLLECTIONS OF THE MARTIN HOUSE INCLUDE THE FRANK LLOYD WRIGHT DESIGNED STRUCTURES, FURNISHINGS AND DECORATIVE ELEMENTS (PRIMARILY ART GLASS). THESE COLLECTIONS ARE THE BASIS OF OUR MISSION TO PRESERVE, RESTORE AND INTERPRET WRIGHT'S GENIUS THROUGH HIS DESIGNS FOR DARWIN AND ISABELLE MARTIN OF BUFFALO, NY.</ExplanationTxt>
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        <GrossRevenueEvent1Amt>54208</GrossRevenueEvent1Amt>
        <OtherDirectExpensesEvent1Amt>9677</OtherDirectExpensesEvent1Amt>
        <Event2Nm>GARDEN PARTY</Event2Nm>
        <GrossReceiptsEvent2Amt>78895</GrossReceiptsEvent2Amt>
        <GrossRevenueEvent2Amt>78895</GrossRevenueEvent2Amt>
        <OtherDirectExpensesEvent2Amt>56560</OtherDirectExpensesEvent2Amt>
        <GrossReceiptsTotalAmt>133103</GrossReceiptsTotalAmt>
        <GrossRevenueTotalEventsAmt>133103</GrossRevenueTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>66237</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>66237</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>66866</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JESSIE FISHER</PersonNm>
        <TitleTxt>CHIEF EXECUTIVE OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>169231</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>6769</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>176000</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>EXECUTIVE DIRECTOR HAS A WRITTEN COMPENSATION CONTRACT THAT WAS APPROVED BY THE EXECUTIVE COMMITTEE.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S MANAGEMENT IS PROVIDED WITH A COPY OF FORM 990 PRIOR TO FILING FOR VERIFICATION AND REVIEW. THEN, THE RETURN IS REVIEWED BY MEMBERS OF THE FINANCE COMMITTEE RESPONSIBLE FOR SIGNING THE RETURN PRIOR TO SIGNING AND FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION REVIEWS AND UPDATES ALL POLICIES , INCLUDING THE CONFLICT OF INTEREST POLICY, ON AN ANNUAL BASIS. NO CHANGES TO CURRENT YEAR POLICIES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>A PERFORMANCE EVALUATION FORM IS CONSISTENTLY USED FOR ALL EMPLOYEES AND THE EXECUTIVE DIRECTOR. ALL FORMS ARE REVIEWED, DISCUSSED, SIGNED BY THE EMPLOYEE AND FILED IN THE PERSONNEL FILE. THE EXECUTIVE DIRECTOR'S EVALUATION FORM IS PREPARED AND REVIEWED BY THE PRESIDENT OF THE BOARD OF DIRECTORS OF THE ORGANIZATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION WILL MAKE APPLICABLE DOCUMENTS AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 PART XII LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>THIS PROCESS HAS NOT CHANGED FROM PRIOR YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>