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        <PersonNm>CYNTHIA CHANG</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>BEA CRUMBINE</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ELLEN T REID</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DEBBIE REYNOLDS</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DEBORAH SCHMIDT ROBINSON</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>CONNIE ANNE HARRIS</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>HEINZ MAUESLI</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DAVIDDE E STRACKBEIN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ALEXANDRA DALPAN CUMMISKEY</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>SUSAN REYNOLDS LEHMAN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MIMI MOULTON</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DMITRI WRIGHT</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>CHARLES F NIEMETH</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>HEATHER SARGENT</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>LEIGH ANN RYAN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DEBRA MECKY</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>RYAN NUCKEL</PersonNm>
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      <ProgramServiceRevenueGrp>
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      <ProgramServiceRevenueGrp>
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      <ProgramServiceRevenueGrp>
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        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>83020</ExclusionAmt>
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      <InfoInScheduleOPartIXInd>X</InfoInScheduleOPartIXInd>
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        <ManagementAndGeneralAmt>10198</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>3290</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1247</ManagementAndGeneralAmt>
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      <TravelGrp>
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        <ProgramServicesAmt>1608</ProgramServicesAmt>
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      <ConferencesMeetingsGrp>
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        <EOYAmt>221522</EOYAmt>
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        <EOYAmt>271042</EOYAmt>
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        <EOYAmt>270717</EOYAmt>
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        <EOYAmt>49930</EOYAmt>
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        <EOYAmt>18800</EOYAmt>
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        <EOYAmt>42152</EOYAmt>
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        <EOYAmt>90000</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>132152</EOYAmt>
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        <EOYAmt>23785564</EOYAmt>
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        <EOYAmt>23917716</EOYAmt>
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        <CurrentTaxYearAmt>145484</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus3YearsAmt>104923</CurrentTaxYearMinus3YearsAmt>
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        <CurrentTaxYearMinus1YearAmt>887772</CurrentTaxYearMinus1YearAmt>
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      <CollectionUsedPreservationInd>X</CollectionUsedPreservationInd>
      <SolicitedAssetsSaleInd>0</SolicitedAssetsSaleInd>
      <AgentTrusteeEtcInd>0</AgentTrusteeEtcInd>
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        <InvestmentEarningsOrLossesAmt>656738</InvestmentEarningsOrLossesAmt>
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        <BookValueAmt>1029612</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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        <BookValueAmt>1474903</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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        <BookValueAmt>88744</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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      <OtherSecuritiesGrp>
        <Desc>MUTUAL FUNDS</Desc>
        <BookValueAmt>4591777</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>7185036</TotalBookValueSecuritiesAmt>
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        <Desc>HISTORIC LAND, BUILDINGS &amp; FURNITURE</Desc>
        <BookValueAmt>7469478</BookValueAmt>
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      <OtherAssetsOrgGrp>
        <Desc>OTHER RECEIVABLE</Desc>
        <BookValueAmt>40000</BookValueAmt>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueNotReportedAmt>281493</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>2491670</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>10198</InvestmentExpensesNotIncldAmt>
      <RevenueNotReportedFinclStmtAmt>10198</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>2501868</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>2829218</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>2829218</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>10198</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>10198</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>2839416</TotalExpensesPerForm990Amt>
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        <FormAndLineReferenceDesc>PART III, LINE 1A:</FormAndLineReferenceDesc>
        <ExplanationTxt>COLLECTIONS: ITEMS IN THE COLLECTION WHICH WERE ACQUIRED THROUGH PURCHASES AND CONTRIBUTIONS SINCE THE HISTORICAL SOCIETY'S INCEPTION ARE NOT RECOGNIZED AS ASSETS ON THE STATEMENT OF FINANCIAL POSITION. THESE CONSIST OF MANUSCRIPTS, REFERENCE WORKS, ART OBJECTS AND OTHER ARTIFACTS OF HISTORICAL SIGNIFICANCE THAT ARE HELD FOR PUBLIC EXHIBITION, EDUCATION AND RESEARCH. PURCHASES OF COLLECTION ITEMS ARE RECORDED AS DECREASES IN NET ASSETS WITHOUT DONOR RESTRICTIONS IN THE YEAR IN WHICH THE ITEMS ARE ACQUIRED, OR AS DECREASES IN NET ASSETS WITH DONOR RESTRICTIONS IF THE ASSETS USED TO PURCHASE THE ITEMS WERE RESTRICTED BY DONORS. PROCEEDS FROM THE SALE OF ANY ITEMS IN THE COLLECTION OR INSURANCE RECOVERIES ARE REFLECTED AS INCREASES IN THE APPROPRIATE NET ASSET CLASSES AND ARE USED EXCLUSIVELY FOR REINVESTMENT IN THE COLLECTION, THE DIRECT CARE AND COLLECTION MANAGEMENT. HISTORIC LAND, BUILDINGS AND FURNITURE: HISTORIC LAND, BUILDINGS AND FURNITURE ARE OF HISTORIC IMPORTANCE AND THEREFORE, ARE NOT SUBJECT TO DEPRECIATION. THEY ARE CAPITALIZED AT COST IF PURCHASED AND AT FAIR VALUE IF RECEIVED BY DONATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE HISTORICAL SOCIETY ACCOUNTS FOR UNCERTAINTY IN INCOME TAX POSITIONS IN THE FINANCIAL STATEMENTS BY APPLYING A RECOGNITION THRESHOLD AND MEASUREMENT ATTRIBUTE FOR FINANCIAL STATEMENT RECOGNITION AND MEASUREMENT OF A TAX POSITION TAKEN OR EXPECTED TO BE TAKEN IN A TAX RETURN. MANAGEMENT HAS ANALYZED THE TAX POSITIONS TAKEN AND HAS CONCLUDED THAT AS OF JUNE 30, 2023, THERE ARE NO UNCERTAIN TAX POSITIONS TAKEN OR EXPECTED TO BE TAKEN THAT WOULD REQUIRE RECOGNITION OF A LIABILITY (OR ASSET) OR DISCLOSURE IN THE FINANCIAL STATEMENTS.</ExplanationTxt>
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        <Event1Nm>90TH ANNIVERSARY</Event1Nm>
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        <CharitableContriEvent1Amt>534371</CharitableContriEvent1Amt>
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        <FoodAndBeverageEvent1Amt>42008</FoodAndBeverageEvent1Amt>
        <EntertainmentEvent1Amt>32550</EntertainmentEvent1Amt>
        <OtherDirectExpensesEvent1Amt>75244</OtherDirectExpensesEvent1Amt>
        <Event2Nm>SPRING TOUR/WINTER MARKET</Event2Nm>
        <GrossReceiptsEvent2Amt>248637</GrossReceiptsEvent2Amt>
        <CharitableContriEvent2Amt>210207</CharitableContriEvent2Amt>
        <GrossRevenueEvent2Amt>38430</GrossRevenueEvent2Amt>
        <RentFacilityCostsEvent2Amt>18545</RentFacilityCostsEvent2Amt>
        <FoodAndBeverageEvent2Amt>27277</FoodAndBeverageEvent2Amt>
        <EntertainmentEvent2Amt>27000</EntertainmentEvent2Amt>
        <OtherDirectExpensesEvent2Amt>21381</OtherDirectExpensesEvent2Amt>
        <GrossReceiptsTotalAmt>832958</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>744578</CharitableContributionsTotAmt>
        <GrossRevenueTotalEventsAmt>88380</GrossRevenueTotalEventsAmt>
        <RentFcltyCostsTotalEventsAmt>136329</RentFcltyCostsTotalEventsAmt>
        <FoodAndBeverageTotalEventsAmt>69285</FoodAndBeverageTotalEventsAmt>
        <EntertainmentTotalEventsAmt>59550</EntertainmentTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>96625</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>361789</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>-273409</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
      <IndividualWithBooksNm>STEPHANIE LALLY DIR OF FINANCE A</IndividualWithBooksNm>
      <PersonsWithBooksUSAddress>
        <AddressLine1Txt>47 STRICKLAND ROAD</AddressLine1Txt>
        <CityNm>COS COB</CityNm>
        <StateAbbreviationCd>CT</StateAbbreviationCd>
        <ZIPCd>06807</ZIPCd>
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    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <HousingAllowanceOrResidenceInd>X</HousingAllowanceOrResidenceInd>
      <WrittenPolicyRefTAndEExpnssInd>0</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>0</SubstantiationRequiredInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
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      <InitialContractExceptionInd>0</InitialContractExceptionInd>
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        <FormAndLineReferenceDesc>PART I, LINE 7</FormAndLineReferenceDesc>
        <ExplanationTxt>HOUSING PROVIDED TO THE EXECUTIVE DIRECTOR FOR THE CONVENIENCE OF THE GREENWICH HISTORICAL SOCIETY, INC.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL BOARD MEMBERS RECEIVE A DRAFT COPY OF THE 990. IT IS CIRCULATED ELECTRONICALLY WITH A REQUEST FOR COMMENT PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>NEW BOARD MEMBERS ARE PROVIDED THE CODE OF ETHICS AS A STANDARD PART OF BOARD ORIENTATION. TIME IS USUALLY ALOTTED ANNUALLY AT BOARD MEETINGS FOR THE CHAIRMAN TO REMIND ALL BOARD MEMBERS OF THE CODE OF ETHICS. ALL STAFF RECEIVE A COPY OF THE PERSONNEL MANUAL AS A CONDITION OF EMPLOYMENT. STAFF MEMBERS MUST REQUEST PERMISSION FROM THE EXECUTIVE DIRECTOR FOR OUTSIDE EMPLOYMENT OR SERVICE. WE HAVE NEVER HAD AN ISSUE ARISE THAT REQUIRED ENFORCEMENT FOR BOARD MEMBERS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION FOR THE EXECUTIVE DIRECTOR IS DETERMINED BY THE EXECUTIVE COMMITTEE IN EXECUTIVE SESSION. PERFORMANCE IS EVALUATED AND APPROPRIATE SALARY IS DETERMINED WITHIN THE SALARY SCALE ESTABLISHED BY AN OUTSIDE CONSULTANT. A RECORD OF THE SALARY DECISION IS PREPARED BY THE CHAIRMAN FOR THE PERSONNEL FILE. IN TWO OF THE LAST FOUR YEARS, THE BOARD OR SELECTED MEMBERS OF THE BOARD WERE ASKED TO EVALUATE THE PERFORMANCE OF THE EXECUTIVE DIRECTOR USING EVALUATION MATERIAL AND FORMS FURNISHED BY BOARDSOURCE. THE COMPENSATION FOR ALL OTHER EMPLOYEES IS DETERMINED BY THE EXECUTIVE DIRECTOR AND IS SET WITHIN THE FRAMEWORK OF A SALARY SCALE ESTABLISHED BY AN OUTSIDE CONSULTING GROUP THAT IS UPDATED AND REVIEWED EVERY 3 - 4 YEARS BY THE EXECUTIVE COMMITTEE OF THE BOARD. THE EXECUTIVE DIRECTOR PROVIDES WRITTEN JOB DESCRIPTIONS, PERFORMANCE STANDARDS AND, FOR KEY POSITIONS, ANNUAL GOALS FOR EACH KEY POSITION. THE EXECUTIVE DIRECTOR CONDUCTS AN ANNUAL FORMAL PERFORMANCE REVIEW OF ALL KEY STAFF AND PROVIDES THE EXECUTIVE COMMITTEE WITH A WRITTEN REPORT INDICATING CHANGES TO GRADE LEVELS, JOB FUNCTIONS AND COMPENSATION. THE TOTAL SALARY BUDGET IS SUBJECT TO FINAL BUDGET APPROVAL BY THE BOARD OF TRUSTEES. THE EXECUTIVE DIRECTOR DELEGATES THE PERFORMANCE REVIEW OF SOME PART-TIME STAFF TO THE APPROPRIATE SUPERVISOR.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 18</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 IS AVAILABLE FOR PUBLIC INSPECTION ON GUIDESTAR AND UPON REQUEST, EXCLUSIVE OF NAMES AND ADDRESSES OF DONORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS ARE ACCESSIBLE TO ALL BOARD MEMBERS IN A SHARED ONLINE FILE AND PRINTED OUT UPON REQUEST. THE CONFLICT OF INTEREST POLICY IS ACCESSIBLE TO ALL STAFF AND BOARD MEMBERS IN A SHARED ONLINE FILE AND PRINTED OUT UPON REQUEST. FINANCIAL STATEMENTS ARE ACCESSIBLE TO ALL STAFF AND BOARD MEMBERS IN A SHARED ONLINE FILE AND DISTRIBUTED AT FINANCE COMMITTEE AND BOARD MEETINGS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 24E</FormAndLineReferenceDesc>
        <ExplanationTxt>MAINTENANCE - BUILDING: PROGRAM SERVICE EXPENSES 86,676. MANAGEMENT AND GENERAL EXPENSES 5,653. FUNDRAISING EXPENSES 1,884. TOTAL EXPENSES 94,213. MUSEUM STORE &amp; CAFE: PROGRAM SERVICE EXPENSES 83,996. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 83,996. CONSULTANTS: PROGRAM SERVICE EXPENSES 49,337. MANAGEMENT AND GENERAL EXPENSES 3,219. FUNDRAISING EXPENSES 1,073. TOTAL EXPENSES 53,629. HOSPITALITY: PROGRAM SERVICE EXPENSES 39,747. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 13,249. TOTAL EXPENSES 52,996. MAINTENANCE - GROUNDS: PROGRAM SERVICE EXPENSES 43,729. MANAGEMENT AND GENERAL EXPENSES 2,852. FUNDRAISING EXPENSES 951. TOTAL EXPENSES 47,532. PRINTING &amp; PHOTCOPYING: PROGRAM SERVICE EXPENSES 35,196. MANAGEMENT AND GENERAL EXPENSES 4,400. FUNDRAISING EXPENSES 4,400. TOTAL EXPENSES 43,996. SUPPLIES: PROGRAM SERVICE EXPENSES 28,663. MANAGEMENT AND GENERAL EXPENSES 3,583. FUNDRAISING EXPENSES 3,583. TOTAL EXPENSES 35,829. DUES &amp; SUBSCRIPTIONS: PROGRAM SERVICE EXPENSES 30,543. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 30,543. HONORARIA: PROGRAM SERVICE EXPENSES 22,765. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 1,000. TOTAL EXPENSES 23,765. EXHIBIT DESIGN: PROGRAM SERVICE EXPENSES 22,550. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 22,550. RENTALS: PROGRAM SERVICE EXPENSES 20,737. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 20,737. BANK &amp; INVESTMENT FEES: PROGRAM SERVICE EXPENSES 16,230. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 4,057. TOTAL EXPENSES 20,287. MAINTENANCE - EQUIPMENT: PROGRAM SERVICE EXPENSES 17,666. MANAGEMENT AND GENERAL EXPENSES 1,152. FUNDRAISING EXPENSES 384. TOTAL EXPENSES 19,202. GRAPHIC DESIGN: PROGRAM SERVICE EXPENSES 14,306. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 350. TOTAL EXPENSES 14,656. POSTAGE &amp; DELIVERY: PROGRAM SERVICE EXPENSES 9,616. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 2,404. TOTAL EXPENSES 12,020. SECURITY: PROGRAM SERVICE EXPENSES 9,356. MANAGEMENT AND GENERAL EXPENSES 610. FUNDRAISING EXPENSES 203. TOTAL EXPENSES 10,169. MISCELLANEOUS EXPENSE: PROGRAM SERVICE EXPENSES 397. MANAGEMENT AND GENERAL EXPENSES 8,793. FUNDRAISING EXPENSES 4. TOTAL EXPENSES 9,194. PHOTOGRAPHY: PROGRAM SERVICE EXPENSES 4,262. MANAGEMENT AND GENERAL EXPENSES 750. FUNDRAISING EXPENSES 3,100. TOTAL EXPENSES 8,112. ONLINE EXPENSE: PROGRAM SERVICE EXPENSES 5,837. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 5,837. CULTIVATION: PROGRAM SERVICE EXPENSES 1,253. MANAGEMENT AND GENERAL EXPENSES 1,462. FUNDRAISING EXPENSES 1,462. TOTAL EXPENSES 4,177. TAXES - REAL ESTATE TAXES: PROGRAM SERVICE EXPENSES 1,777. MANAGEMENT AND GENERAL EXPENSES 116. FUNDRAISING EXPENSES 39. TOTAL EXPENSES 1,932.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS FORMED AN AUDIT COMMITTEE TO OVERSEE THE AUDIT PROCESS.</ExplanationTxt>
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</Return>
