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      <Form990PartVIISectionAGrp>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JAMES ALLEN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JANE GOLDSTEIN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JILL GOLDEN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JIM HAYNES</PersonNm>
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        <PersonNm>JOHN DAVID MYLES</PersonNm>
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        <PersonNm>LINDY B STREET</PersonNm>
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        <PersonNm>MADISON HAMMAN</PersonNm>
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        <PersonNm>MARSHALL FARRER</PersonNm>
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        <PersonNm>ORME SANDY WILSON III</PersonNm>
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        <PersonNm>PHIL POINDEXTER</PersonNm>
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        <PersonNm>SHELLIE BENOVITZ</PersonNm>
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        <PersonNm>SUSAN DABNEY LAVIN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>TED STEINBOCK MD</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>WESTRAY COBB</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>WILLIAM SUMMERS V</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>RICHARD HC CLAY</PersonNm>
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        <PersonNm>MILOS D MALDONADO</PersonNm>
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        <PersonNm>JULIE SCOSKIE JAMES</PersonNm>
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        <PersonNm>PATRICK A LEWIS</PersonNm>
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        <BusinessCd>900099</BusinessCd>
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        <ProgramServicesAmt>44420</ProgramServicesAmt>
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        <FundraisingAmt>15429</FundraisingAmt>
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        <ProgramServicesAmt>2149</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4560</ManagementAndGeneralAmt>
        <FundraisingAmt>321</FundraisingAmt>
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        <ManagementAndGeneralAmt>389</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>21935</ProgramServicesAmt>
        <ManagementAndGeneralAmt>20498</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>20577</ProgramServicesAmt>
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        <FundraisingAmt>3079</FundraisingAmt>
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        <ProgramServicesAmt>254263</ProgramServicesAmt>
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        <ProgramServicesAmt>7771</ProgramServicesAmt>
        <ManagementAndGeneralAmt>16490</ManagementAndGeneralAmt>
        <FundraisingAmt>1163</FundraisingAmt>
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        <ProgramServicesAmt>3727</ProgramServicesAmt>
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        <ProgramServicesAmt>440890</ProgramServicesAmt>
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        <ProgramServicesAmt>46272</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2746</ManagementAndGeneralAmt>
        <FundraisingAmt>2694</FundraisingAmt>
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        <ProgramServicesAmt>162657</ProgramServicesAmt>
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        <FundraisingAmt>6365</FundraisingAmt>
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        <ProgramServicesAmt>71758</ProgramServicesAmt>
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        <ProgramServicesAmt>21262</ProgramServicesAmt>
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        <FundraisingAmt>340</FundraisingAmt>
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        <ProgramServicesAmt>1303</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2764</ManagementAndGeneralAmt>
        <FundraisingAmt>195</FundraisingAmt>
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        <TotalAmt>3999564</TotalAmt>
        <ProgramServicesAmt>3116810</ProgramServicesAmt>
        <ManagementAndGeneralAmt>555933</ManagementAndGeneralAmt>
        <FundraisingAmt>326821</FundraisingAmt>
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        <EOYAmt>355</EOYAmt>
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        <EOYAmt>1021051</EOYAmt>
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      <PledgesAndGrantsReceivableGrp>
        <BOYAmt>2005460</BOYAmt>
        <EOYAmt>1600603</EOYAmt>
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        <BOYAmt>31028</BOYAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 1A:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY'S HISTORICAL COLLECTION IS MADE UP OF ARTIFACTS OF HISTORICAL SIGNIFICANCE, SUCH AS ARTWORK, BOOKS, PHOTOGRAPHS, AND MANUSCRIPTS. ITEMS ARE CATALOGED, PRESERVED AND CARED FOR, AND ACTIVITIES VERIFYING THEIR EXISTENCE AND ASSESSING THEIR CONDITION ARE PERFORMED CONTINUOUSLY. COLLECTION ITEMS ACQUIRED EITHER THROUGH PURCHASE OR DONATION ARE NOT CAPITALIZED. THE COST OF OBJECTS PURCHASED IS INCLUDED AS AN EXPENSE IN THE STATEMENTS OF ACTIVITIES AND CHANGES IN NET ASSETS. FOR THE YEARS ENDED DECEMBER 31, 2024 AND 2023, THE SOCIETY PURCHASED HISTORICAL OBJECTS FOR $23,252 AND $38,602, RESPECTIVELY. CONTRIBUTIONS OF COLLECTION ITEMS ARE NOT RECOGNIZED IN THE STATEMENTS OF ACTIVITIES AND CHANGES IN NET ASSETS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY'S HISTORICAL COLLECTION IS MADE UP OF ARTIFACTS OF HISTORICAL SIGNIFICANCE, SUCH AS ARTWORK, BOOKS, PHOTOGRAPHS, AND MANUSCRIPTS. ITEMS ARE CATALOGED, PRESERVED AND CARED FOR, AND ACTIVITES VERIFYING THEIR EXISTENCE AND ASSESSING THEIR CONDITION ARE PERFORMED CONTINOUSLY. THE FILSON HISTORICAL SOCIETY OPERATES WITH A PURPOSE TO COLLECT AND PRESERVE HISTORICAL MATERIALS, TO PUBLISH AND DISSEMINATE HISTORICAL INFORMATION AND TO STIMULATE THE PUBLIC'S INTEREST IN HISTORICAL INQUIRY. SUCH COLLECTION FURTHERS THIS MISSION.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE INTENDED USES OF THE ORGANIZATION'S ENDOWMENT FUNDS ARE TO SUPPORT ITS PROGRAMS AND OPERATIONS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY IS EXEMPT FROM INCOME TAXES PURSUANT TO SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE. ACCORDINGLY, NO PROVISION FOR INCOME TAXES IS REFLECTED IN THE ACCOMPANYING FINANCIAL STATEMENTS. THE SOCIETY HAS ALSO BEEN CLASSIFIED AS AN ENTITY THAT IS NOT A PRIVATE FOUNDATION WITHIN THE MEANING OF SECTION 509(A) OF THE INTERNAL REVENUE CODE. THE SOCIETY RECOGNIZES UNCERTAIN INCOME TAX POSITIONS USING THE MORE LIKELY THAN NOT APPROACH AS DEFINED IN THE ASC. NO LIABILITY FOR UNCERTAIN TAX POSITIONS HAS BEEN RECORDED IN THE ACCOMPANYING FINANCIAL STATEMENTS.</ExplanationTxt>
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      <SupplementalInformationDetail>
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      <SupplementalInformationDetail>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>RENTAL EXPENSE 731. EVENTS EXPENSE 27,311. COGS 12,658.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE 2021 BEGINNING BALANCE OF THE ENDOWMENT WAS RESTATED TO REFLECT A RECLASSIFICATION/RESTATEMENT OF RESTRICTED NET ASSETS ON THE AUDITED FINANCIALS STATEMENTS BETWEEN BOARD DESIGNATED ENDOWMENT ASSETS AND BENEFICIAL INTEREST IN TRUST</ExplanationTxt>
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        <ExplanationTxt>THE NUMBER REPORTED IN COLUMN B OF SCHEDULE M FOR ALL DONATIONS REPRESENTS THE NUMBER OF CONTRIBUTIONS FOR EACH RESPECTIVE CATEGORY.</ExplanationTxt>
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        <ExplanationTxt>THE ORGANIZATION DOES NOT REPORT CONTRIBUTIONS OF HISTORICAL TREASURES AS REVENUE BECAUSE THE ORGANIZATION DOES NOT CAPITALIZE ITS COLLECTIONS AS ALLOWED UNDER SFAS 116 (ASC 958-360-25).</ExplanationTxt>
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        <ExplanationTxt>THE ORGANIZATION'S FINANCE COMMITTEE REVIEWS THE FORM 990 PRIOR TO ITS FILING.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>CONFLICT OF INTEREST STATEMENTS ARE COMPLETED AT LEAST ANNUALLY BY EVERY OFFICER, DIRECTOR AND KEY EMPLOYEE. NO EXCEPTIONS TO REPORT.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION FOR THE PRESIDENT &amp; CEO IS APPROVED BY THE FILSON BOARD OF DIRECTORS. THE PROCESS INVOLVES AN ANNUAL PERFORMANCE REVIEW CONDUCTED BY THE CHAIR OF THE BOARD AND THE CHAIR OF THE GOVERNANCE COMMITTEE, WITH A RECOMMENDATION TO THE FULL BOARD FOR APPROVAL. FOR OTHER LEADERSHIP TEAM EMPLOYEES, MULTIPLE COMPARABLES ARE PULLED FROM LIKE ORGANIZATIONS AND SIMILAR FIELDS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>AVAILABLE UPON REQUEST.</ExplanationTxt>
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        <ExplanationTxt>CHANGE IN VALUE OF INTEREST IN BENEFICIAL TRUST 598,027.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PROCESS HAS NOT CHANGED FROM PRIOR YEAR. USE OF A FINANCE COMMITTEE COMPRISED OF THE BOARD TREASURER SERVING AS COMMITTEE CHAIR AND AT LEAST THREE ADDITIONAL VOTING BOARD MEMBERS. THE COMMITTEE REVIEWS INFORMATION AND REPORTS TO THE FULL BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>