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      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>Pt III Ln 12</FormAndLineReferenceDesc>
        <ExplanationTxt>Other Income Part III, Line 12 Description: Other Income 2020: 297. 2021: 126. 2022: 593. 2023: 378. 2024: 2216.</ExplanationTxt>
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          <AddressLine2>RESTRICTED</AddressLine2>
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      <OtherLiabilitiesOrgGrp>
        <Desc>RENT RECEIVED IN ADVANCE</Desc>
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      <FootnoteTextInd>X</FootnoteTextInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt V, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>Net assets with donor restrictions total $196,066 and are available for the following purposes: Curatorial Progams - $14,221; Public Programs - $108,265; Grounds and Gardens - $709; Permanent endowment funds of $72,871 included in the total are gifts - instruments requiring in perpetuity that the principal be invested and the income only be used for the maintenance of the Hooper-Lee Nichols House.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt X, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization currently evaluates all tax positions, and makes a determination regarding the likelihood of those positions being upheld under review. The primary tax positions made by the Organization are the existence of unrelated business income tax and the Organizations status as a Tax-exempt Organization under section 501(c)(3) of the Internal Revenue Code. For the years presented, the Organization has not recognized any tax benefits or loss contingencies for uncertain tax positions based on this evaluation. All tax periods prior to fiscal year ended December 31, 2021 are no longer subject to examination by tax authorities.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt III, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>Collection consists of property entrusted to and accepted by the Society. The Organization allows the general public, scholars, historians, etc to gain entrance to extract relevant information from the Societys collections.</ExplanationTxt>
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    </IRS990ScheduleD>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 8b</FormAndLineReferenceDesc>
        <ExplanationTxt>No committee has the authority to act on behalf of the governing body.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>A copy of the Federal 990 will be given to each director for review and discussion.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization requires each new key employee, officer, or Director to review a copy of the Policy on Conflict of Interest and Disclosure of Certain Interest.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board of Directors establishes the compensation for the Executive Director that are within the range of organizations similar in size and scope of History Cambridge.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>Copy of the financial statements are attached to the Form PC which is filed with the Secretary of State and made available for public inspection. Also, copy of financial statements are available for public inspection upon request at the Organizations office: 159 Brattle Street, Cambridge, MA 02138.</ExplanationTxt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>Honoraria 450. 450. 0. 0.</ExplanationTxt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>Consulting and Contract Help 51106. 42293. 0. 8813.</ExplanationTxt>
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      <SupplementalInformationDetail>
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  </ReturnData>
</Return>