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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>TAYLOR B WAGENSEIL</PersonNm>
        <TitleTxt>DIRECTOR (UNTIL 5/23/24)</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>RICHARD D BATCHELDER JR</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>NIRAV G DESAI</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MARY JO MAJORS</PersonNm>
        <TitleTxt>DIRECTOR (UNTIL 3/20/25)</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JAMES F MCHUGH III</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JESSICA STEBBINS</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN FITZGERALD</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DEAN H STEEGER</PersonNm>
        <TitleTxt>TREASURER(APPT. 9/25/24)/DIRECTOR</TitleTxt>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DENNIS J WHITE</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>KENYON P KELLOGG III</PersonNm>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ANNE GRIMES RAND</PersonNm>
        <TitleTxt>PRESIDENT/CEO</TitleTxt>
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        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>213987</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JACQUELINE HIBBARD</PersonNm>
        <TitleTxt>SVP/COO/CFO</TitleTxt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>19670</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>SARAH WATKINS</PersonNm>
        <TitleTxt>SVP/CHIEF EXPERIENCE OFFICER</TitleTxt>
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        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
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        <OtherCompensationAmt>25583</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>SHARLENE SONES - DIRECTOR OF</PersonNm>
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        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>101808</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>12884</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>KATHRYN TODD</PersonNm>
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        <ReportableCompFromOrgAmt>167113</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <TotalReportableCompFromOrgAmt>806486</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
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      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>CCS FUNDRAISING</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>155 FEDERAL ST 306</AddressLine1Txt>
            <CityNm>BOSTON</CityNm>
            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>02110</ZIPCd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>CAMBRIDGE SEVEN ASSOCIATES</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
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            <StateAbbreviationCd>MA</StateAbbreviationCd>
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      <FundraisingAmt>333723</FundraisingAmt>
      <GovernmentGrantsAmt>555267</GovernmentGrantsAmt>
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      <TotalContributionsAmt>2243696</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
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      <ProgramServiceRevenueGrp>
        <Desc>CURATORIAL</Desc>
        <BusinessCd>900099</BusinessCd>
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        <RelatedOrExemptFuncIncomeAmt>44975</RelatedOrExemptFuncIncomeAmt>
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      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>386450</TotalRevenueColumnAmt>
        <ExclusionAmt>386450</ExclusionAmt>
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      <GrossRentsGrp>
        <RealAmt>15962</RealAmt>
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      <LessRentalExpensesGrp>
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      <RentalIncomeOrLossGrp>
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      <NetRentalIncomeOrLossGrp>
        <TotalRevenueColumnAmt>15962</TotalRevenueColumnAmt>
        <ExclusionAmt>15962</ExclusionAmt>
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      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>1514417</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>1449229</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>65188</SecuritiesAmt>
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      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>65188</TotalRevenueColumnAmt>
        <ExclusionAmt>65188</ExclusionAmt>
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      <FundraisingGrossIncomeAmt>61312</FundraisingGrossIncomeAmt>
      <ContriRptFundraisingEventAmt>333723</ContriRptFundraisingEventAmt>
      <FundraisingDirectExpensesAmt>108673</FundraisingDirectExpensesAmt>
      <NetIncmFromFundraisingEvtGrp>
        <TotalRevenueColumnAmt>-47361</TotalRevenueColumnAmt>
        <ExclusionAmt>-47361</ExclusionAmt>
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      <GrossSalesOfInventoryAmt>418026</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>71043</CostOfGoodsSoldAmt>
      <NetIncomeOrLossGrp>
        <TotalRevenueColumnAmt>346983</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>294886</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>52097</UnrelatedBusinessRevenueAmt>
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      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>4081335</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1365303</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>52097</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>420239</ExclusionAmt>
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      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>470453</TotalAmt>
        <ProgramServicesAmt>179512</ProgramServicesAmt>
        <ManagementAndGeneralAmt>191903</ManagementAndGeneralAmt>
        <FundraisingAmt>99038</FundraisingAmt>
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        <ProgramServicesAmt>1198453</ProgramServicesAmt>
        <ManagementAndGeneralAmt>112711</ManagementAndGeneralAmt>
        <FundraisingAmt>363978</FundraisingAmt>
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      <PensionPlanContributionsGrp>
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        <ProgramServicesAmt>18937</ProgramServicesAmt>
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      <OtherEmployeeBenefitsGrp>
        <TotalAmt>150900</TotalAmt>
        <ProgramServicesAmt>115570</ProgramServicesAmt>
        <ManagementAndGeneralAmt>9746</ManagementAndGeneralAmt>
        <FundraisingAmt>25584</FundraisingAmt>
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      <PayrollTaxesGrp>
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        <ProgramServicesAmt>109257</ProgramServicesAmt>
        <ManagementAndGeneralAmt>21710</ManagementAndGeneralAmt>
        <FundraisingAmt>30584</FundraisingAmt>
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      <FeesForServicesLegalGrp>
        <TotalAmt>8524</TotalAmt>
        <ManagementAndGeneralAmt>5110</ManagementAndGeneralAmt>
        <FundraisingAmt>3414</FundraisingAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>84103</TotalAmt>
        <ManagementAndGeneralAmt>84103</ManagementAndGeneralAmt>
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      <FeesForServicesLobbyingGrp>
        <TotalAmt>60000</TotalAmt>
        <FundraisingAmt>60000</FundraisingAmt>
      </FeesForServicesLobbyingGrp>
      <FeesForServicesProfFundraising>
        <TotalAmt>306000</TotalAmt>
        <FundraisingAmt>306000</FundraisingAmt>
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      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>36091</TotalAmt>
        <ManagementAndGeneralAmt>36091</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>96105</ProgramServicesAmt>
        <ManagementAndGeneralAmt>55989</ManagementAndGeneralAmt>
        <FundraisingAmt>72134</FundraisingAmt>
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      <AdvertisingGrp>
        <TotalAmt>16262</TotalAmt>
        <ProgramServicesAmt>16262</ProgramServicesAmt>
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      <OfficeExpensesGrp>
        <TotalAmt>59362</TotalAmt>
        <ProgramServicesAmt>34925</ProgramServicesAmt>
        <ManagementAndGeneralAmt>13925</ManagementAndGeneralAmt>
        <FundraisingAmt>10512</FundraisingAmt>
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      <InformationTechnologyGrp>
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        <ProgramServicesAmt>79242</ProgramServicesAmt>
        <ManagementAndGeneralAmt>20826</ManagementAndGeneralAmt>
        <FundraisingAmt>29313</FundraisingAmt>
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        <ProgramServicesAmt>336320</ProgramServicesAmt>
        <ManagementAndGeneralAmt>15555</ManagementAndGeneralAmt>
        <FundraisingAmt>14898</FundraisingAmt>
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      <TravelGrp>
        <TotalAmt>11889</TotalAmt>
        <ProgramServicesAmt>3928</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2443</ManagementAndGeneralAmt>
        <FundraisingAmt>5518</FundraisingAmt>
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      <ConferencesMeetingsGrp>
        <TotalAmt>93308</TotalAmt>
        <ProgramServicesAmt>93308</ProgramServicesAmt>
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        <ProgramServicesAmt>122479</ProgramServicesAmt>
        <FundraisingAmt>713</FundraisingAmt>
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      <InsuranceGrp>
        <TotalAmt>73913</TotalAmt>
        <ProgramServicesAmt>68739</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3696</ManagementAndGeneralAmt>
        <FundraisingAmt>1478</FundraisingAmt>
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        <TotalAmt>9200</TotalAmt>
        <ManagementAndGeneralAmt>9200</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>COLLECTIONS, EXHIBITS &amp;</Desc>
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        <ProgramServicesAmt>54369</ProgramServicesAmt>
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      <OtherExpensesGrp>
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        <ProgramServicesAmt>182</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4898</ManagementAndGeneralAmt>
        <FundraisingAmt>22214</FundraisingAmt>
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      <OtherExpensesGrp>
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        <ProgramServicesAmt>1919</ProgramServicesAmt>
        <ManagementAndGeneralAmt>6892</ManagementAndGeneralAmt>
        <FundraisingAmt>1000</FundraisingAmt>
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      <AllOtherExpensesGrp>
        <TotalAmt>1715</TotalAmt>
        <FundraisingAmt>1715</FundraisingAmt>
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      <TotalFunctionalExpensesGrp>
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        <ProgramServicesAmt>2529507</ProgramServicesAmt>
        <ManagementAndGeneralAmt>594798</ManagementAndGeneralAmt>
        <FundraisingAmt>1051865</FundraisingAmt>
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      <CashNonInterestBearingGrp>
        <BOYAmt>913848</BOYAmt>
        <EOYAmt>1266255</EOYAmt>
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      <SavingsAndTempCashInvstGrp>
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        <EOYAmt>2396734</EOYAmt>
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      <PledgesAndGrantsReceivableGrp>
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        <EOYAmt>275576</EOYAmt>
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      <AccountsReceivableGrp>
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        <EOYAmt>28899</EOYAmt>
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      <InventoriesForSaleOrUseGrp>
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        <EOYAmt>81839</EOYAmt>
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      <PrepaidExpensesDefrdChargesGrp>
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        <EOYAmt>31543</EOYAmt>
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      <LandBldgEquipBasisNetGrp>
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        <EOYAmt>1108057</EOYAmt>
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      <InvestmentsPubTradedSecGrp>
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        <EOYAmt>10189751</EOYAmt>
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        <EOYAmt>7051</EOYAmt>
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      <OtherAssetsTotalGrp>
        <BOYAmt>997752</BOYAmt>
        <EOYAmt>31024</EOYAmt>
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      <TotalAssetsGrp>
        <BOYAmt>14797709</BOYAmt>
        <EOYAmt>15416729</EOYAmt>
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        <EOYAmt>336754</EOYAmt>
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        <EOYAmt>7075</EOYAmt>
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        <EOYAmt>464705</EOYAmt>
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      <TotalLiabilitiesGrp>
        <BOYAmt>573247</BOYAmt>
        <EOYAmt>808534</EOYAmt>
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      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
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        <BOYAmt>3227696</BOYAmt>
        <EOYAmt>3497795</EOYAmt>
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      <DonorRestrictionNetAssetsGrp>
        <BOYAmt>10996766</BOYAmt>
        <EOYAmt>11110400</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>14224462</BOYAmt>
        <EOYAmt>14608195</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
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        <EOYAmt>15416729</EOYAmt>
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      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>-94835</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>490566</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>-11998</OtherChangesInNetAssetsAmt>
      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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        <CurrentTaxYearAmt>0</CurrentTaxYearAmt>
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        <CurrentYearMinus1Amt>84475</CurrentYearMinus1Amt>
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        <CurrentYearMinus1Amt>0</CurrentYearMinus1Amt>
        <CurrentYearAmt>0</CurrentYearAmt>
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        <ExplanationTxt>THE MUSEUM'S COLLECTIONS ARE NOT REFLECTED ON THE STATEMENTS OF FINANCIAL POSITION. PURCHASED ADDITIONS TO THE COLLECTIONS ARE RECORDED AS EXPENSES AT THE TIME ACQUIRED. THE COLLECTION IS DEEMED INEXHAUSTIBLE. THE COLLECTION IS MAINTAINED FOR EDUCATION AND RESEARCH AND FURTHERANCE OF THE MUSEUM'S GOALS RATHER THAN FINANCIAL GAIN. THE COLLECTION IS PROTECTED, KEPT UNENCUMBERED AND IS SUBJECT TO AN ORGANIZATIONAL POLICY THAT ENCOURAGES PERMANENT POSSESSION. THE MUSEUM'S COLLECTIONS POLICY REQUIRES THAT PROCEEDS FROM THE SALE OF COLLECTION ITEMS BE USED FOR THE ACQUISITION OR DIRECT CARE OF COLLECTION ITEMS. DIRECT CARE INCLUDES, BUT IS NOT LIMITED TO, CONTRACT CONSERVATION AND CONSULTANT COSTS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MUSEUM COLLECTS, PRESERVES, DISPLAYS AND INTERPRETS ITEMS RELATED TO THE SAILING FRIGATE USS CONSTITUTION, THE OLDEST COMMISSIONED WARSHIP AFLOAT IN THE WORLD. THE MUSEUM HAS MORE THAN 10,000 ARTIFACTS AND ARCHIVAL MATERIALS IN ITS COLLECTION. MANY ARE ON DISPLAY IN THE GALLERIES AND HELP TELL THE STORIES OF USS CONSTITUTION AND THE MEN AND WOMEN WHO SERVED (AND STILL SERVE) ON BOARD HER. MANY ITEMS HAVE BEEN DIGITIZED AND ARE SHARED ON THE MUSEUM'S WEBSITE.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PERMANENT AND QUASI ENDOWMENTS PROVIDE INCOME FOR THE MUSEUM FROM INTEREST AND DIVIDENDS FOR ITS EDUCATIONAL MISSION AND OPERATIONS. THE PURPOSE OF THE TEMPORARILY RESTRICTED ENDOWMENT IS TO PROVIDE FUNDING, WHEN APPROPRIATE, TO RENOVATE THE BUILDING AND PROVIDE SAILS, RIGGING AND OTHER SHIP RELATED IMPROVEMENTS FOR USS CONSTITUTION.</ExplanationTxt>
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        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MUSEUM IS SUBJECT TO THE PROVISIONS OF ACCOUNTING STANDARDS CODIFICATION ("ASC") TOPIC 740, INCOME TAXES, AS IT RELATES TO ACCOUNTING AND REPORTING FOR UNCERTAINTY IN INCOME TAXES. THE MUSEUM HAS ASSESSED ITS TAX POSITION TAKEN AND HAS DETERMINED THAT THERE ARE NO UNCERTAIN TAX POSITIONS THAT WOULD REQUIRE RECOGNITION OF AN ASSET OR LIABILITY OR DISCLOSURE AS OF MARCH 31, 2025.</ExplanationTxt>
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        <ExplanationTxt>COST OF GOODS SOLD (RETAIL OPERATIONS) 71,043. SPECIAL EVENTS 108,673.</ExplanationTxt>
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      <EmailSolicitationsInd>X</EmailSolicitationsInd>
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      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KATHRYN TODD</PersonNm>
        <TitleTxt>CHIEF DEVELOPMENT OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>166975</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>138</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>13350</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>180463</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SARAH WATKINS</PersonNm>
        <TitleTxt>SVP/CHIEF EXPERIENCE OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>126608</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>258</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>2387</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>23196</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>152449</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION FOR THE PRESIDENT/CEO OF THE MUSEUM IS SET BY THE BOARD OF TRUSTEES AND IS INCLUDED IN THE BUDGET PROCESS. ANY CHANGE IN SALARY IS REVIEWED BY THE COMPENSATION COMMITTEE AND IS SIGNED BY THE CHAIRMAN OF THE BOARD OF TRUSTEES. SALARY SURVEY INFORMATION IS OBTAINED FROM THE NEW ENGLAND MUSEUM ASSOCIATION AND THE HUMAN RESOURCES CONSORTIUM OF THE CULTURAL INSTITUTIONS OF THE GREATER BOSTON AREA.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 7</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PRESIDENT/CEO &amp; SVP/CHIEF OPERATING &amp; FINANCE OFFICER (COO/CFO) REPORTED IN PART VII, SECTION A, LINE 1A, RECEIVED PERFORMANCE-BASED ANNUAL BONUSES. THE PRESIDENT'S BONUS IS APPROVED BY THE COMPENSATION COMMITTEE AND THE SVP/COO/CFO'S BONUS IS APPROVED BY THE PRESIDENT.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <WorksOfArtGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>1</ContributionCnt>
      </WorksOfArtGrp>
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>6</ContributionCnt>
        <NoncashContributionsRptF990Amt>84704</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>MARKET QUOTATION</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <HistoricalArtifactsGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>4</ContributionCnt>
      </HistoricalArtifactsGrp>
      <Form8283ReceivedCnt>0</Form8283ReceivedCnt>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, COLUMN (B):</FormAndLineReferenceDesc>
        <ExplanationTxt>THERE WERE 6 SEPARATE STOCK DONATIONS DURING THE FISCAL YEAR ENDED MARCH 31, 2025. ONE DONOR DONATED SHARES OF STOCK OF 3 DIFFERENT COMPANIES, AND THREE DONORS DONATED SHARES OF STOCK OF THREE DIFFERENT COMPANIES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 33:</FormAndLineReferenceDesc>
        <ExplanationTxt>SCHEDULE M, PART I, LINE 22 - HISTORICAL ARTIFACTS THE MUSEUM HAS ELECTED, AS PERMITTED UNDER ASC 958-360-25 (SFAS 116) NOT TO REPORT IN ITS REVENUE STATEMENT AND BALANCE SHEET, THE DONATED WORKS OF ART AND HISTORICAL ARTIFACTS IT RECEIVES THAT ARE HELD FOR PUBLIC EXHIBITION, EDUCATION OR RESEARCH. DURING FY25, THE MUSEUM RECEIVED 1 DONATED WORK OF ART AND 4 DONATED HISTORICAL ARTIFACTS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PRESIDENT/CEO AND THE SVP/COO/CFO REVIEW A DRAFT OF THE FORM 990 BEFORE IT'S FILED. A COPY OF THE DRAFT FORM 990 IS ALSO SENT VIA EMAIL TO ALL BOARD MEMBERS AT WHICH TIME THEY CAN ASK QUESTIONS OR MAKE COMMENTS ON THE DRAFT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MUSEUM DISTRIBUTES THE CONFLICT OF INTEREST FORMS TO ALL TRUSTEES WHO MUST SIGN AND RETURN THE FORM. ANY CONFLICTS THAT ARISE WOULD BE HANDLED BY THE EXECUTIVE COMMITTEE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION FOR THE PRESIDENT/CEO OF THE MUSEUM IS SET BY THE BOARD OF TRUSTEES AND IS INCLUDED IN THE BUDGET PROCESS. ANY CHANGE IN SALARY IS REVIEWED BY THE COMPENSATION COMMITTEE AND IS SIGNED BY THE CHAIRMAN OF THE BOARD OF TRUSTEES. THE COMPENSATION FOR ALL OTHER STAFF IS SET THROUGH THE BUDGET PROCESS WHICH IS REVIEWED BY THE FINANCE COMMITTEE AND ULTIMATELY APPROVED BY THE BOARD OF TRUSTEES. THE PRESIDENT SIGNS ALL LETTERS OF HIRE. DEPARTMENT DIRECTORS SIGN THE SALARY FORM FOR CHANGES FOR PAYROLL PURPOSES. SALARY SURVEY INFORMATION IS OBTAINED FROM THE NEW ENGLAND MUSEUM ASSOCIATION AND THE HUMAN RESOURCES CONSORTIUM OF THE CULTURAL INSTITUTIONS OF THE GREATER BOSTON AREA.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>COPIES OF THE DOCUMENTS ARE AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUITY LIABILITY REVALUATION ADJUSTMENT -11,998.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS NOT CHANGED ITS OVERSIGHT OR SELECTION PROCESS FROM THE PRIOR YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART I, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>MEMBERS OF OUR BOARD OF DIRECTORS, LIFE TRUSTEES AND MEMBERS OF OUR BOARD OF OVERSEERS SERVE ON MUSEUM COMMITTEES AND SUPPORT OUR ANNUAL GALA. OTHER VOLUNTEERS ASSIST WITH VISITOR SERVICES, COLLECTIONS, MARKETING AND EVENTS. IN ADDITION, WE HAVE VOLUNTEERS FROM A MODELERS GUILD WHO BUILD SHIP MODELS IN OUR GALLERIES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>