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        <TitleTxt>Trustee</TitleTxt>
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        <PersonNm>Ms Cynthia A Hewitt</PersonNm>
        <TitleTxt>Trustee</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Mr Frank L Hohmann III</PersonNm>
        <TitleTxt>Trustee</TitleTxt>
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        <PersonNm>Mr Joseph C Hoopes Jr</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Mrs Richard I G Jones</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Mr Edward W Kane</PersonNm>
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        <PersonNm>Mrs Ellen J Kullman</PersonNm>
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        <PersonNm>Mr Nicholas P Lambrow</PersonNm>
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        <PersonNm>Mr Forbes Maner</PersonNm>
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        <PersonNm>Mr John L McGraw</PersonNm>
        <TitleTxt>Chairman &amp; Trustee Emeritu</TitleTxt>
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        <PersonNm>Mrs Elizabeth H Owens</PersonNm>
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        <PersonNm>Mr Christopher S Patterson</PersonNm>
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        <PersonNm>Mr Bruce C Perkins</PersonNm>
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        <PersonNm>Dr Donald J Puglisi</PersonNm>
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        <PersonNm>Mrs Lynn Springer Roberts</PersonNm>
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        <PersonNm>Mr P Allen Smith</PersonNm>
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        <PersonNm>Mr Matthew A Thurlow</PersonNm>
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        <PersonNm>Mr P Coleman Townsend</PersonNm>
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        <PersonNm>Mr Rodman Ward Jr</PersonNm>
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        <PersonNm>Dr Richard C Weiss</PersonNm>
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        <PersonNm>The Honorable W L Lyons Brown</PersonNm>
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        <PersonNm>Mr Samuel Schwartz</PersonNm>
        <TitleTxt>Chairman &amp; Trustee Emeritu</TitleTxt>
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        <PersonNm>Mrs George P Bissell Jr</PersonNm>
        <TitleTxt>Trustee Emerita</TitleTxt>
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        <PersonNm>Mrs Alice Cary Brown</PersonNm>
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        <PersonNm>Mrs Louisa C Duemling</PersonNm>
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        <PersonNm>Mrs Elizabeth B Johnson</PersonNm>
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        <PersonNm>Mrs Julia Bissell Leisenring</PersonNm>
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        <PersonNm>Mr Blaine T Phillips</PersonNm>
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        <PersonNm>Mr Geoffrey M Rogers</PersonNm>
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        <PersonNm>Dr David P Roselle</PersonNm>
        <TitleTxt>Exec.Dir.and Trustee to 6/18</TitleTxt>
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        <PersonNm>Mr Mark E Stalnecker</PersonNm>
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        <PersonNm>Mr David D Wakefield</PersonNm>
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        <PersonNm>Mr David B Warren</PersonNm>
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        <PersonNm>Mr Charles O Wood III</PersonNm>
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        <PersonNm>Mr Edmond L Lincoln</PersonNm>
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        <PersonNm>Ms Melanie S Richardson</PersonNm>
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        <PersonNm>Ms Marjorie P McGraw</PersonNm>
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        <PersonNm>Ms Lucy S Rhame</PersonNm>
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        <PersonNm>MrStephen S Smith</PersonNm>
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        <PersonNm>Mr Robert Necarsulmer</PersonNm>
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        <PersonNm>Ms Denise D Adams</PersonNm>
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        <PersonNm>Ms Jane E Drummond</PersonNm>
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        <PersonNm>Mr David Durandt</PersonNm>
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        <PersonNm>Mr Robert R Davis</PersonNm>
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        <PersonNm>Mr John Savage</PersonNm>
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        <PersonNm>Ms Lisbeth Selsor</PersonNm>
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        <PersonNm>Mr Christopher Strand</PersonNm>
        <TitleTxt>Dir.-Garden and Estate</TitleTxt>
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        <FormAndLineReferenceDesc>Part III, Line 1a:</FormAndLineReferenceDesc>
        <ExplanationTxt>In conformity with FASB ASC 958-605, the financial statements exclude the value of the collection objects and library holdings. No determination can be made as to the aggregate value of such items. Winterthur records proceeds from deaccessions and disbursements for current period accessions in the statement of activity as revenue and expenditures, respectively. Proceeds from sales of collection items are limited to the acquisition of other items for collections or the direct care of existing collection items. Winterthur employs conservation and curatorial staff to ensure that the collection is protected and preserved.</ExplanationTxt>
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        <ExplanationTxt>Winterthur's collection of decorative and fine arts remains one of the best in the country, and objects are displayed in 175 museum rooms and 35,000 square feet of self-guided galleries. The collections include over 90,000 objects including furniture, architecture, textiles, paintings, metals, ceramics, glass, and works of art on paper. The comprehensive research library features books, periodicals, manuscripts, visual images, and ephemera. Much of the scholarship on early American material culture has been written on the basis of research conducted at Winterthur, via both its collection of objects as well as the material found in its library. The Winterthur and University of Delaware Program in American Material Culture (WPAMC) is the country's leading graduate program in the study of American decorative arts and material life, and the Winterthur/University of Delaware Program in Art Conservation (WUDPAC) is one of only four graduate programs in the United States that educates and trains conservation professionals in multiple disciplines to care for our cultural heritage. Winterthur Museum, Garden &amp; Library is committed to providing an array of artistic and educational programming. Currently, we are designing exhibitions, programs, and events that utilize our rich collection materials and vast knowledge base to appeal to Winterthur's traditional visitor while encouraging the patronage of a new, diverse, and intergenerational audience. Over the years, through innovative exhibitions, programs, and events, Winterthur has become a unique national treasure, a vital community resource, and a place that engages adults and youth in entertaining and memorable experiences that are relevant to their lives. Winterthur's goal has been to interpret its collections through enticing programs that help young visitors understand people, art, and landscapes-past and present. Culture enthusiasts and families with children make up the bulk of Winterthur's general attendance, of over 128,000 in FY2019. Many of these visitors are cultural tourists and museum members who take garden tours, docent-guided gallery tours, guided period room tours, special focus tours, or partake in Winterthur's family and school programming. Winterthur offers eighteen interactive, curriculum-based and developmentally-appropriate programs for students in preschool through the 12th grade. These programs take place both at Winterthur and in school classrooms throughout the Delaware Valley as part of our school outreach program, and are often geared toward our changing exhibitions.</ExplanationTxt>
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        <ExplanationTxt>Special Event Expenses 614,246. Cost of Sales 518,913.</ExplanationTxt>
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        <FormAndLineReferenceDesc>Part XI, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Rental and event expenses 461,696.</ExplanationTxt>
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        <ExplanationTxt>Special Event Expenses 614,246. Cost of Goods Sold 518,913.</ExplanationTxt>
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        <ExplanationTxt>Rental and event expenses 461,696.</ExplanationTxt>
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        <ExplanationTxt>The only disbursements made to non-affiliated persons in furtherance of its mission and exempt purpose are to the graduate students (Winterthur Program in American Material Culture) and research fellowships (Research Fellowship Program). The graduate student awards are made according to admission procedures consistent with practices at the University of Delaware, which co-sponsors the awards, and supervised by University of Delaware faculty. All Research Fellowship awards are made according to selection procedures consistent with practices of the National Endowment for the Humanities. Graduate student award funds are monitored according to internal fiscal practices of both the Winterthur Museum and the University of Delaware. Research Fellowship expenditures are monitored by monthly internal tracking.</ExplanationTxt>
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          <PersonNm>Mr Nicholas P Lambrow</PersonNm>
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        </NameOfInterested>
        <RelationshipDescriptionTxt>Real estate relationship with Trustee</RelationshipDescriptionTxt>
        <TransactionDesc>Mr. Patterson became a Trustee of Winterthur in May 2018. Mr. Patterson is a real estate agent with the family's real estate firm. Winterthur has done business with Patterson-Schwartz for many years. It is an established policy that all Trustees recuse themselves from Committee or Board decisions for which they or their firms have a potential conflict of interest.</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <WorksOfArtGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>230</ContributionCnt>
        <MethodOfDeterminingRevenuesTxt>FASB ASC 958-360-25</MethodOfDeterminingRevenuesTxt>
      </WorksOfArtGrp>
      <BooksAndPublicationsGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <MethodOfDeterminingRevenuesTxt>FASB ASC 958-360-25</MethodOfDeterminingRevenuesTxt>
      </BooksAndPublicationsGrp>
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>7</ContributionCnt>
        <NoncashContributionsRptF990Amt>313276</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>Fair Market Value</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <Form8283ReceivedCnt>6</Form8283ReceivedCnt>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>1</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 32b:</FormAndLineReferenceDesc>
        <ExplanationTxt>Winterthur uses a brokerage account with an unrelated financial institution to process non-cash contributions of stock. Deaccessioned material is sold thru public auction houses, e.g. Sotheby's, Pook &amp; Pook, Inc. and Christie's.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 33:</FormAndLineReferenceDesc>
        <ExplanationTxt>A zero amount is reported in Sch M, Part I, line 3(c), because Winterthur does not capitalize its collection, as allowed under FASB ASC 958-360-25.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>Some Board members share a family relationship.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Audit Committee reviews the Form 990 before the return is signed and filed.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Each Trustee must complete a Conflict of Interest Policy Disclosure Statement upon his/her election to the Board and annually thereafter. Board members are required to acknowledge a potential conflict to the Board prior to entering into a transaction with the Museum. 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 Chairman of the Board. The Chairman 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 Human Resources Committee of the Board of Trustees oversees a national salary survey every three years. The Committee also gathers local salary data to help establish current market values for the Museum's salaried positions. The collected survey data supports a salary structure that aligns every position within a salary range. The Human Resources Committee reviews all salary rates including the Executive Director and departmental Directors and then approves the rates of pay prior to budget approval for the next fiscal year.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>While the Museum routinely provides copies of the audited financial statements when requested,it has never received a request for its conflict of interest policy or governing documents. Although there is no legal requirement that it do so, in the interest of transparency, requests of this nature will be evaluated by the Museum and responded to on a case by case basis.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XII, Line 2c</FormAndLineReferenceDesc>
        <ExplanationTxt>Winterthur has an Audit Committee that is responsible for the selection and oversight of the independent auditor.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>