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        <OfficerInd>X</OfficerInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>RICHARD JOHNSON</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
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        <OfficerInd>X</OfficerInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MICHAEL CHIARAPPA</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JUNE DEHART</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>CRAIG FULLER</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>J CHRISTIAN FENGER</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DAGMAR GIPE</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>FRED HOCKER</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>REZA JAFARI</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DEBORAH LAWRENCE</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN PFLIEGER JR</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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      <Form990PartVIISectionAGrp>
        <PersonNm>WILLIAM RYAN</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MILES REIDY</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN SEIDEL</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ENOS THROOP</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN VILLA</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <IndivRcvdGreaterThan100KCnt>3</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>false</FormerOfcrEmployeesListedInd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>GILBANE BUILDING COMPANY</BusinessNameLine1Txt>
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        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1215 E FORT AVENUE</AddressLine1Txt>
            <CityNm>BALTIMORE</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>21230</ZIPCd>
          </USAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>VISIONARY PHILANTHROPIC CONSULTING</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>5 BLUEBILL AVENUE 507</AddressLine1Txt>
            <CityNm>NAPLES</CityNm>
            <StateAbbreviationCd>FL</StateAbbreviationCd>
            <ZIPCd>34108</ZIPCd>
          </USAddress>
        </ContractorAddress>
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        <BusinessCd>713110</BusinessCd>
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      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIP DUES</Desc>
        <BusinessCd>713110</BusinessCd>
        <TotalRevenueColumnAmt>647407</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>647407</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
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        <RelatedOrExemptFuncIncomeAmt>131945</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>SHIPYARD</Desc>
        <BusinessCd>713110</BusinessCd>
        <TotalRevenueColumnAmt>166056</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>166056</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>CONCESSION SALES</Desc>
        <BusinessCd>713110</BusinessCd>
        <TotalRevenueColumnAmt>35049</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>35049</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>2475908</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>39490</TotalRevenueColumnAmt>
        <ExclusionAmt>39490</ExclusionAmt>
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      <GrossRentsGrp>
        <RealAmt>516832</RealAmt>
      </GrossRentsGrp>
      <LessRentalExpensesGrp>
        <RealAmt>535039</RealAmt>
      </LessRentalExpensesGrp>
      <RentalIncomeOrLossGrp>
        <RealAmt>-18207</RealAmt>
      </RentalIncomeOrLossGrp>
      <NetRentalIncomeOrLossGrp>
        <TotalRevenueColumnAmt>-18207</TotalRevenueColumnAmt>
        <UnrelatedBusinessRevenueAmt>-18207</UnrelatedBusinessRevenueAmt>
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      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>1425732</SecuritiesAmt>
        <OtherAmt>545228</OtherAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>201025</SecuritiesAmt>
        <OtherAmt>178823</OtherAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>1224707</SecuritiesAmt>
        <OtherAmt>366405</OtherAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>1591112</TotalRevenueColumnAmt>
      </NetGainOrLossInvestmentsGrp>
      <FundraisingGrossIncomeAmt>146467</FundraisingGrossIncomeAmt>
      <ContriRptFundraisingEventAmt>365429</ContriRptFundraisingEventAmt>
      <FundraisingDirectExpensesAmt>146467</FundraisingDirectExpensesAmt>
      <GrossSalesOfInventoryAmt>330254</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>174623</CostOfGoodsSoldAmt>
      <NetIncomeOrLossGrp>
        <TotalRevenueColumnAmt>155631</TotalRevenueColumnAmt>
        <UnrelatedBusinessRevenueAmt>155631</UnrelatedBusinessRevenueAmt>
      </NetIncomeOrLossGrp>
      <OtherRevenueMiscGrp>
        <Desc>CHANGE IN COST OF LIFE INSURANCE VALUE</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>229</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>229</RelatedOrExemptFuncIncomeAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueMiscGrp>
        <Desc>OTHER INCOME</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>4997</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>4997</RelatedOrExemptFuncIncomeAmt>
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      <OtherRevenueTotalAmt>5226</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>6912273</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>2481134</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>137424</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>39490</ExclusionAmt>
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      <GrantsToDomesticOrgsGrp>
        <TotalAmt>0</TotalAmt>
      </GrantsToDomesticOrgsGrp>
      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>0</TotalAmt>
      </GrantsToDomesticIndividualsGrp>
      <ForeignGrantsGrp>
        <TotalAmt>0</TotalAmt>
      </ForeignGrantsGrp>
      <BenefitsToMembersGrp>
        <TotalAmt>0</TotalAmt>
      </BenefitsToMembersGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>715359</TotalAmt>
        <ProgramServicesAmt>424099</ProgramServicesAmt>
        <ManagementAndGeneralAmt>227936</ManagementAndGeneralAmt>
        <FundraisingAmt>63324</FundraisingAmt>
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      <CompDisqualPersonsGrp>
        <TotalAmt>0</TotalAmt>
      </CompDisqualPersonsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>2141760</TotalAmt>
        <ProgramServicesAmt>1269737</ProgramServicesAmt>
        <ManagementAndGeneralAmt>682433</ManagementAndGeneralAmt>
        <FundraisingAmt>189590</FundraisingAmt>
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      <PensionPlanContributionsGrp>
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        <ProgramServicesAmt>13380</ProgramServicesAmt>
        <ManagementAndGeneralAmt>9009</ManagementAndGeneralAmt>
        <FundraisingAmt>3828</FundraisingAmt>
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        <TotalAmt>135924</TotalAmt>
        <ProgramServicesAmt>114225</ProgramServicesAmt>
        <ManagementAndGeneralAmt>16011</ManagementAndGeneralAmt>
        <FundraisingAmt>5688</FundraisingAmt>
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      <PayrollTaxesGrp>
        <TotalAmt>225861</TotalAmt>
        <ProgramServicesAmt>130631</ProgramServicesAmt>
        <ManagementAndGeneralAmt>70074</ManagementAndGeneralAmt>
        <FundraisingAmt>25156</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesManagementGrp>
        <TotalAmt>0</TotalAmt>
      </FeesForServicesManagementGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>27696</TotalAmt>
        <ProgramServicesAmt>4834</ProgramServicesAmt>
        <ManagementAndGeneralAmt>6158</ManagementAndGeneralAmt>
        <FundraisingAmt>16704</FundraisingAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>0</TotalAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesLobbyingGrp>
        <TotalAmt>0</TotalAmt>
      </FeesForServicesLobbyingGrp>
      <FeesForServicesProfFundraising></FeesForServicesProfFundraising>
      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>41139</TotalAmt>
        <ManagementAndGeneralAmt>41139</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>46778</ProgramServicesAmt>
        <ManagementAndGeneralAmt>59597</ManagementAndGeneralAmt>
        <FundraisingAmt>161651</FundraisingAmt>
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      <AdvertisingGrp>
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        <ProgramServicesAmt>81451</ProgramServicesAmt>
        <ManagementAndGeneralAmt>6338</ManagementAndGeneralAmt>
        <FundraisingAmt>51141</FundraisingAmt>
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        <ProgramServicesAmt>205660</ProgramServicesAmt>
        <ManagementAndGeneralAmt>55501</ManagementAndGeneralAmt>
        <FundraisingAmt>35924</FundraisingAmt>
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      <InformationTechnologyGrp>
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      </InformationTechnologyGrp>
      <RoyaltiesGrp>
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      <OccupancyGrp>
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        <ProgramServicesAmt>635454</ProgramServicesAmt>
        <ManagementAndGeneralAmt>54524</ManagementAndGeneralAmt>
        <FundraisingAmt>5937</FundraisingAmt>
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      <TravelGrp>
        <TotalAmt>13786</TotalAmt>
        <ProgramServicesAmt>9133</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3819</ManagementAndGeneralAmt>
        <FundraisingAmt>834</FundraisingAmt>
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      <PymtTravelEntrtnmntPubOfclGrp>
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      </PymtTravelEntrtnmntPubOfclGrp>
      <ConferencesMeetingsGrp>
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        <ProgramServicesAmt>79968</ProgramServicesAmt>
        <ManagementAndGeneralAmt>-5670</ManagementAndGeneralAmt>
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      <PaymentsToAffiliatesGrp>
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        <ProgramServicesAmt>1152190</ProgramServicesAmt>
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        <ProgramServicesAmt>202304</ProgramServicesAmt>
        <ManagementAndGeneralAmt>43481</ManagementAndGeneralAmt>
        <FundraisingAmt>13863</FundraisingAmt>
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        <TotalAmt>437832</TotalAmt>
        <ProgramServicesAmt>437832</ProgramServicesAmt>
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      <OtherExpensesGrp>
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        <ProgramServicesAmt>792667</ProgramServicesAmt>
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      <OtherExpensesGrp>
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        <ProgramServicesAmt>74821</ProgramServicesAmt>
        <FundraisingAmt>4737</FundraisingAmt>
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      <OtherExpensesGrp>
        <Desc>EXHIBITS AND LIBRARY ACQUISITIONS</Desc>
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        <ProgramServicesAmt>327472</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3414</ManagementAndGeneralAmt>
        <FundraisingAmt>24475</FundraisingAmt>
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      <AllOtherExpensesGrp>
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        <ProgramServicesAmt>38598</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1500</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>6041234</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1275264</ManagementAndGeneralAmt>
        <FundraisingAmt>602852</FundraisingAmt>
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        <EOYAmt>1561345</EOYAmt>
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      <SavingsAndTempCashInvstGrp>
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        <EOYAmt>363604</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <PledgesAndGrantsReceivableGrp>
        <BOYAmt>1667921</BOYAmt>
        <EOYAmt>1488565</EOYAmt>
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      <AccountsReceivableGrp>
        <BOYAmt>272668</BOYAmt>
        <EOYAmt>273374</EOYAmt>
      </AccountsReceivableGrp>
      <InventoriesForSaleOrUseGrp>
        <BOYAmt>457997</BOYAmt>
        <EOYAmt>357852</EOYAmt>
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      <PrepaidExpensesDefrdChargesGrp>
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        <EOYAmt>219335</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>37277797</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>19793168</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>17882389</BOYAmt>
        <EOYAmt>17484629</EOYAmt>
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      <InvestmentsPubTradedSecGrp>
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        <EOYAmt>19265934</EOYAmt>
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      <IntangibleAssetsGrp>
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        <EOYAmt>387167</EOYAmt>
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      <TotalAssetsGrp>
        <BOYAmt>41365303</BOYAmt>
        <EOYAmt>41401805</EOYAmt>
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      <AccountsPayableAccrExpnssGrp>
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        <EOYAmt>641108</EOYAmt>
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        <EOYAmt>374401</EOYAmt>
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        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF GOVERNORS, WHO ARE ALSO MEMBERS, IS THE ONLY GOVERNING BODY THAT HAS THE AUTHORITY TO ELECT NEW GOVERNORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS INITIALLY REVIEWED BY THE ORGANIZATIONS CHIEF FINANCIAL OFFICER. AFTER THE INITIAL REVIEW THE FORM 990 IS REVIEWED AND APPROVED BY THE AUDIT COMMITTEE OF THE BOARD OF GOVERNORS, THEN BY THE ENTIRE BOARD OF GOVERNORS PRIOR TO SUBMISSION WITH THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL BOARD MEMBERS ARE REQUIRED TO COMPLETE A CONFLICT OF INTEREST FORM ANNUALLY AND DISCLOSE ANY RELATIONSHIPS WITH THE MUSEUM. NEW BOARD MEMBERS AND KEY EMPLOYEES ARE ALSO REQUIRED TO COMPLETE THIS FORM.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH FISCAL YEAR, PREFERABLY NOT CONTEMPORANEOUSLY WITH THE PERFORMANCE REVIEW, THE CHAIR, IN CONSULTATION WITH THE EXECUTIVE COMMITTEE, SHALL SET THE COMPENSATION OF THE PRESIDENT AND CEO FOR THE ENSUING 12 MONTHS. IN DOING SO, THE CHAIR SHALL TAKE INTO ACCOUNT PERFORMANCE, TENURE, CHANGES IN THE COST-OF-LIVING INDEX, COMPENSATION OF COMPARABLE NOT-FOR-PROFIT ORGANIZATIONS, THE FINANCIAL CONDITION OF CBMM AND OTHER FACTORS AS THE CHAIR AND THE EXECUTIVE COMMITTEE MAY DEEM APPROPRIATE. EXCEPT IN EXTRAORDINARY CIRCUMSTANCES AND THEN ONLY IF APPROVED BY THE BOARD OF GOVERNORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION OF THE PRESIDENT AND CEO SHALL NOT EXCEED THE RANGE OF COMPENSATION OF THE CEO OF COMPARABLE ORGANIZATIONS, AS SET FORTH IN THE MOST RECENT COMPENSATION REPORT OF CHARITY NAVIGATOR OR OTHER INDEPENDENT ENTITY THAT GATHERS AND REPORTS ON THE COMPENSATION OF CEOS OF NOT-FOR-PROFIT ORGANIZATIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATIONS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS ARE MADE AVAILABLE TO THE PUBLIC UPON REQUEST. THE ANNUAL REPORT IS ALSO AVAILABLE ON THE ORGANIZATIONS WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>