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      <FactsAndCircumstancesTestTxt>The Eleutherian Mills-Hagley Foundation ("Hagley"), a nonstock, not-for-profit educational corporation was incorporated in the State of Delaware on November 3, 1952. Donations of property made at that time and subsequently by eight different donors totaling approximately 235 acres.The Eleutherian Mills-Hagley Foundation gave notice of intent to terminate Private Foundation status under section 507(b)(1)(B) for a sixty-month period beginning January 1, 1975 through December 31, 1980. Notification was received from the Internal Revenue Service on June 5, 1980 that Hagley had been classified as an organization described in Section 509 (a)(1) and 170(b)(1)(A)(vi), under the "facts and circumstances" test.Hagley's property has been an industrial site since at least the beginning of the nineteenth century, and contains approximately 85 buildings and 93 site structures of varying size and condition of repair, relating to industrial and residential life of the 19th and early 20th centuries. The Hagley Museum and Library was opened to the public in 1957 and since that time visitation has exceeded 5,000,000. It is presently open to the public 363 days a year. Hagley Museum holds 60,000 objects, including a large collection of U.S. patent models, early American furniture and textiles, and a major collection of advertising art. Museum programs include special tours for school groups conducted by a corps of professionally trained guides. The Library at Hagley traces its origins to the old Longwood Library that was established by Pierre S. du Pont in 1954. In 1961 it merged with the Hagley Museum and moved its present site on the banks of the Brandywine. Today its research collections hold the archives of more than 1,000 businesses in more than 38,000 linear feet of manuscript records, more than 290,000 published sources, more than 2 million audiovisual items, and more than 320,000 digital artifacts which preserve an invaluable record of American business, technological, and social development. Hagley's main strength is in the Middle Atlantic region, but in recent years the scope of its collecting has broadened to include records of and works about business organizations and companies with national impact. The Library's national stature was recognized in 1985, when it was granted membership in the Independent Research Libraries Association (IRLA).The Center for the History of Business, Technology, and Society, a department of the Library, was founded in 1975 to encourage and coordinate research in Hagley's areas of research and collecting interests. The Center sponsors conferences, colloquia, and seminars and it issues publications. Since 1977 it has awarded competitive research fellowships to more than 700 scholars from around the world. The BHOC continues a beneficial relationship with the University of Delaware. Since 2015, a "Hagley Does History!" course has been offered through the University of Delaware's Osher Lifelong Learning Institute to enrollees of all ages. Hagley's principal support has historically come from endowments. Since 1978, with the formal creation of a development office, Hagley has increased its fund-raising activities to include the active solicitation of individuals, corporations, foundations, as well as state and federal government agencies. The planning and coordination of all fund-raising programs for endowment operations and special projects are now centralized.A general membership program known as "Hagley Associates" was formed in 1975 to encourage further community support for Hagley. The number of Hagley Associates' memberships for 2019 totaled approximately 3,000.A business membership program, known as "Corporate Associates", was formed in 1982. One of the benefits of being a corporate member is being able to rent Hagley's rooms and facilities for business meetings. The number of corporate associates for 2019 totaled approximately 100. The Foundation is governed by a board of fourteen trustees including not only leaders in the local community, but also specialists in several fields pertinent to Museum and Library operations.</FactsAndCircumstancesTestTxt>
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        <EndYearBalanceAmt>155203454</EndYearBalanceAmt>
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        <OtherExpendituresAmt>8169819</OtherExpendituresAmt>
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        <BeginningYearBalanceAmt>140314489</BeginningYearBalanceAmt>
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      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
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        <BookValueAmt>1419399</BookValueAmt>
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      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>28550902</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>17782539</DepreciationAmt>
        <BookValueAmt>10768363</BookValueAmt>
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      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>8068886</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>4737493</DepreciationAmt>
        <BookValueAmt>3331393</BookValueAmt>
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      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>1052707</OtherCostOrOtherBasisAmt>
        <BookValueAmt>1052707</BookValueAmt>
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      <TotalBookValueLandBuildingsAmt>16571862</TotalBookValueLandBuildingsAmt>
      <CloselyHeldEquityInterestsGrp>
        <BookValueAmt>16821299</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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      <TotalBookValueSecuritiesAmt>16821299</TotalBookValueSecuritiesAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>Accrued Post Retirement Benefits</Desc>
        <Amt>18350</Amt>
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      <TotalLiabilityAmt>18350</TotalLiabilityAmt>
      <TotalRevEtcAuditedFinclStmtAmt>27566869</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>20198130</NetUnrealizedGainsInvstAmt>
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      <RevenueNotReportedFinclStmtAmt>832960</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>7787060</TotalRevenuePerForm990Amt>
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        <FormAndLineReferenceDesc>Part III, Line 1a:</FormAndLineReferenceDesc>
        <ExplanationTxt>Hagley does not capitalize donated collection items or recognize them as revenues or gains. 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 are restricted by donors. Proceeds from de-accessions or insurance recoveries are reflected as increases in the appropriate net asset class.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part III, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>The collections are held for public exhibition, education, or research in furtherance of public service rather than financial gain. They are protected, kept unencumbered, cared for, and preserved, and are subject to a policy that requires the proceeds from sales of collection items to be used to acquire other items for collections.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>Hagley has adopted investment and spending policies for endowment assets that attempt to provide a predictable stream of funding to programs supported by its endowment while seeking to maintain the purchasing power of the endowment assets. Endowment assets include those assets of donor-restricted funds that Hagley must hold in perpetuity or for a donor-specified period(s) as well as Board-designated funds. Under this policy, as approved by the Board of Trustees, the endowment assets are invested in a manner that is intended to maintain the level of financial support currently provided while assuming a moderate level of investment risk.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Special Event Expenses Reported on 990 p. 9, Line 8b 328,924. Cost of Goods Sold on 990 p. 9, Line 10b 65,283. Rental Expenses Reported on 990 p. 9, Line 6b 20,432.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Rental Expenses Reported on 990 p. 9, Line 6b 20,432. Special Event Expenses Reported on 990 p. 9, Line 8b 328,924. Cost of Goods Sold on 990 p. 9, Line 10b 65,283.</ExplanationTxt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland &amp; Greenland) - Albania, Andorra, Austria, Belgium</RegionTxt>
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        <EmployeeCnt>0</EmployeeCnt>
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      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>10292506</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>10292506</TotalSpentAmt>
      <TransferToForeignCorpInd>1</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>1</ForeignPartnershipInd>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part III Accounting Method:</FormAndLineReferenceDesc>
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      <EmailSolicitationsInd>X</EmailSolicitationsInd>
      <InPersonSolicitationsInd>X</InPersonSolicitationsInd>
      <SolicitationOfNonGovtGrantsInd>X</SolicitationOfNonGovtGrantsInd>
      <SolicitationOfGovtGrantsInd>X</SolicitationOfGovtGrantsInd>
      <SpecialFundraisingEventsInd>X</SpecialFundraisingEventsInd>
      <AgrmtProfFundraisingActyInd>1</AgrmtProfFundraisingActyInd>
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        <OrganizationBusinessName>
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        <USAddress>
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          <CityNm>Chevy Chase</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
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        <GrossReceiptsTotalAmt>473037</GrossReceiptsTotalAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule G, Part I, Line 2b, Column (v)</FormAndLineReferenceDesc>
        <ExplanationTxt>Lynch Pinnacle is a professional fundraising consultant which is assisting Hagley in implementing several donor development programs.</ExplanationTxt>
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        <RecipientCnt>41</RecipientCnt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>Hagley research grants are awarded through an application and evaluation process. The committee, comprised of Hagley experts and outside scholars, assesses applications 4 times per year. Applicants must demonstrate their research will make important scholarly and academic contributions; potential grant recipients must also make sufficient use of Hagley's research collections. 41 grants were awarded in 2019.</ExplanationTxt>
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      <WrittenPolicyRefTAndEExpnssInd>1</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
      <CompensationCommitteeInd>X</CompensationCommitteeInd>
      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
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      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
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      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>David Cole</PersonNm>
        <TitleTxt>Executive Director</TitleTxt>
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        <DeferredCompensationFlngOrgAmt>15750</DeferredCompensationFlngOrgAmt>
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        <TotalCompensationFilingOrgAmt>262239</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Erik Rau</PersonNm>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>As a condition of employment and for the convenience of the Organization, the Executive Director resides on Hagley's premises.</ExplanationTxt>
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    </IRS990ScheduleJ>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <BooksAndPublicationsGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <MethodOfDeterminingRevenuesTxt>FASB ASC 958-360-25</MethodOfDeterminingRevenuesTxt>
      </BooksAndPublicationsGrp>
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>7</ContributionCnt>
        <NoncashContributionsRptF990Amt>112664</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>PUBLICLY TRADED VALUE</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <HistoricalArtifactsGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>402</ContributionCnt>
        <MethodOfDeterminingRevenuesTxt>FASB ASC 958-360-25</MethodOfDeterminingRevenuesTxt>
      </HistoricalArtifactsGrp>
      <Form8283ReceivedCnt>2</Form8283ReceivedCnt>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 33:</FormAndLineReferenceDesc>
        <ExplanationTxt>Hagley does not consider its collection items to be monetary assets and therefore (following FASB and AAM guidance) does not record a monetary value with their receipt.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>Some Trustees have a common family relationship.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>Draft versions of the Form 990 are distributed to all members of the Board prior to filing.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Each Director must complete a Conflict of Interest Policy Disclosure Statement annually. Board members are required to acknowledge a potential conflict to the Board prior to entering into a transaction with Hagley. The minutes of the Board meeting at which a disclosure of conflict is made shall reflect the occurrence and the outcome. The Executive Director monitors contracts and vendor payments for potential conflicts of interest and informs the President of the Board. The President then brings the potential conflict to the Board for discussion when deemed possibly material.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>The Executive Director gathers local salary data as well as national salary survey data every other year in order to establish current market values for Hagley's salaried positions. The collected survey data supports a salary structure that aligns every position within a salary range. The Executive Director works with the Organization and Compensation Committee under the Board of Directors in order to ensure that the proper appraisal systems and compensation and benefits philosophies approved by the Committee are adhered to by management.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>There currently exists no legal requirement to make governing documents, conflict of interest policies or audited financial statements publicly available. Hagley has never received a request for information of this type. If any requests for this information should be received, they would be evaluated by the Trustees on a case by case basis. In general, the Trustees believe that the information available on this form (the Form 990) would be more than sufficient to respond to most legitimate inquiries.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, Line 2c:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Audit and Finance Committee assumes oversight of the financial statements and the selection of the independent auditors.</ExplanationTxt>
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    </IRS990ScheduleO>
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</Return>