Rudi Ekkart

Rudolf Erik Otto "Rudi" Ekkart (born 23 December 1947) is a Dutch art historian, curator, museum director, professor, and provenance researcher.

He is known for his scholarship on Dutch and Flemish portraiture, especially portraiture in Holland between the late sixteenth and mid-seventeenth centuries, and for his role in Dutch provenance research and art-restitution policy after the Second World War.

From 1990 to 2012, he served as director of the Netherlands Institute for Art History (RKD), where his work connected connoisseurship, archival documentation, museum research, and the systematic study of Dutch and Flemish art.

In 2004, Ekkart was appointed professor of methodological aspects of art-historical documentation at Utrecht University, a chair that reflected the RKD's central role in attribution, documentation, image archives, and the research infrastructure of Dutch art history. His inaugural lecture, delivered in 2005, was titled Kwesties van vraag en antwoord. The exhibition brought together sixty-six examples of seventeenth-century Dutch portraiture and was reviewed as one of several major studies that expanded scholarly attention to Dutch portraiture as a distinct historical and artistic field.

He has also published on individual portraitists and draftsmen, including Johannes Thopas, the seventeenth-century deaf draughtsman whose portrait drawings were the subject of Ekkart's study Deaf, Dumb and Brilliant: Johannes Thopas, Master Draughtsman. CODART lists his later publications on subjects including Rembrandt's portrait commissions, Govert Flinck, Ferdinand Bol, Aert Schouman, and Johann Friedrich August Tischbein, showing the range of his work across portraiture, court culture, museum catalogues, and exhibition scholarship.

In 2012, the Dordrechts Museum, in collaboration with the RKD, organized Portret in portret in de Nederlandse kunst in honor of Ekkart's retirement from the RKD. CODART described Ekkart as a prominent specialist in portraiture and identified Dutch portraiture from the sixteenth century to the present as his central field of study. The NK Collection consisted of roughly 4,000 objects, including paintings, works on paper, furniture, ceramics, and other objects that had been confiscated during the war, recovered from Germany, and remained in Dutch state custody.

The committee recommended that sales by Jewish private persons in the Netherlands from 10 May 1940 onward be treated as forced sales unless express evidence showed otherwise, and that claimants receive the benefit of the doubt where the wartime record was incomplete. One of its recommendations concerned the establishment of a separate Restitutions Committee to handle individual restitution requests; the Dutch Restitutions Committee was established in late 2001. Later restitution cases continued to cite the Ekkart Committee's recommendations, including its standard that title to a claimed work could be accepted when proved with a high degree of probability and without indications to the contrary.

Ekkart later chaired the independent supervisory committee overseeing renewed provenance research into NK Collection objects at the Cultural Heritage Agency of the Netherlands. The agency described the committee's role as monitoring the quality of past and future provenance research and assessing whether research standards were sufficient to determine object histories as accurately as possible.

Authentication and art-historical method Ekkart's work also extended into the field of art authentication, where questions of attribution, documentation, provenance, technical research, and legal responsibility converge. In 2012, he and Milko den Leeuw founded the Authentication in Art Foundation, which brought together specialists from art history, conservation, material science, the art market, and art law to address developments in authentication practice.

Honors In 2023, Ekkart was made an honorary member of the Association for Dutch Art Historians.

Major publications

1975 Ekkart, R.E.O., introduction. Athenae Batavae: De Leidse Universiteit / The University of Leiden, 1575–1975. Leiden: Universitaire Pers Leiden, 1975. ISBN 9060212223.

1977 Ekkart, Rudi. Franeker professorenportretten: Iconografie van de professoren aan de Academie en het Rijksathenaeum te Franeker, 1585–1843. Franeker: Wever, 1977. ISBN 9061352630.

1979 Ekkart, Rudi. Johannes Cornelisz. Verspronck: Leven en werken van een Haarlems portretschilder uit de 17de eeuw. Haarlem: Frans Halsmuseum, 1979.

1985 Ekkart, Rudi. De Rijmbijbel van Jacob van Maerlant: Een in 1332 voltooid handschrift uit het Rijksmuseum Meermanno-Westreenianum. The Hague: Staatsuitgeverij, 1985. ISBN 9012048664.

1987 Ekkart, Rudi. Vroege boekdrukkunst uit Italië: Italiaanse incunabelen uit het Rijksmuseum Meermanno-Westreenianum. The Hague: Staatsuitgeverij, 1987. ISBN 9012055962.

Ekkart, Rudi. Catalogus van de schilderijen in het Rijksmuseum Meermanno-Westreenianum. The Hague: Rijksmuseum Meermanno-Westreenianum, 1987. ISBN 9012056985.

1988 Ekkart, Rudi. John Buckland Wright 1897–1954, boekillustrator: Een overzicht van het materiaal rond de boekillustraties van John Buckland Wright in het Museum van het Boek. The Hague: Rijksmuseum Meermanno-Westreenianum, 1988.

1991 Ekkart, Rudi. Knappe koppen: Vier eeuwen Nederlands professorenportret. Utrecht: Centraal Museum, 1991. ISBN 9060117638.

1992 Ekkart, Rudi. Een boekmuseum verzamelt: Aanwinsten 1987–1991 verworven tijdens het directoraat van dr. J. Offerhaus. The Hague: Rijksmuseum Meermanno-Westreenianum / Museum van het Boek, 1992. ISBN 9060117956.

1995 Ekkart, Rudi. Nederlandse portretten uit de 17e eeuw: Eigen collectie / Dutch Portraits from the Seventeenth Century: Own Collection. Rotterdam: Museum Boijmans Van Beuningen, 1995. ISBN 9069181401.

1997 Ekkart, Rudi. Portrettisten en portretten: Studies over portretkunst in Holland, 1575–1650. PhD dissertation, University of Amsterdam, 1997.

1998 Ekkart, Rudi. Isaac Claesz. van Swanenburg, 1537–1614: Leids schilder en burgemeester. Zwolle: Waanders, 1998. ISBN 9040092826.

1999 Ekkart, Rudi. Spinoza in beeld: Het onbekende gezicht / Spinoza in Portrait: The Unknown Face. Voorschoten: Vereniging Het Spinozahuis, 1999.

2005 Ekkart, Rudi. Kwesties van vraag en antwoord. Utrecht and Zwolle: Utrecht University / Waanders, 2005. ISBN 9789040088223.

2006 Ekkart, Rudi. Herkomst gezocht: Eindrapportage Commissie Ekkart / Origins Unknown: Final Report Ekkart Committee. Zwolle: Waanders, 2006. ISBN 9789040083488.

Ekkart, Rudi. Tibout Regters 1710–1768: Schilder van portretten en conversatiestukken. Leiden: Primavera Pers, 2006. ISBN 9059970322.

2007 Ekkart, Rudi; Buvelot, Quentin, eds. Dutch Portraits: The Age of Rembrandt and Frans Hals. Zwolle: Waanders Publishers, 2007. Dutch edition: Hollanders in beeld: Portretten uit de Gouden Eeuw. ISBN 9789040083341.

2009 Ekkart, Rudi. Johannes Verspronck and the Girl in Blue. Amsterdam: Rijksmuseum / Nieuw Amsterdam, 2009. ISBN 9789086890538.

2011 Ekkart, Rudi. Dutch and Flemish Portraits 1600–1800: Holland és flamand 17–18. századi arcképek. Old Masters’ Gallery Catalogues, Szépművészeti Múzeum Budapest, vol. 1. Leiden: Primavera Press; Budapest: Szépművészeti Múzeum, 2011. ISBN 9789059971004.

2014 Ekkart, Rudi; Schretlen, Helen C.M. Museale verwervingen vanaf 1933: Herkomstonderzoek naar museale collecties in verband met roof, confiscatie of gedwongen verkoop in de periode 1933–1945 / Investigation into the Provenance of Museum Collections in Connection with the Theft, Confiscation and Sale of Objects under Duress between 1933 and 1945. Amsterdam: Museumvereniging, 2014.

Ekkart, Rudi. Deaf, Dumb & Brilliant: Johannes Thopas, Master Draughtsman. London: Paul Holberton Publishing, 2014. ISBN 9781907372674.

2015 Ekkart, Rudi; van den Donk, Claire. Van Bol tot Veth: De portretverzameling van de families Van de Poll, Wolters en Quina. Leiden: Primavera Pers, 2015. ISBN 9789059972148.

2017 Ekkart, Rudi; Muller, Eelke. Roof en restitutie: De uittocht en gedeeltelijke terugkeer van Nederlands kunstbezit tijdens en na de Tweede Wereldoorlog. Deventer: Ter Borch Stichting, 2017. ISBN 9789082675207.

2018 Ekkart, Rudi; van den Donk, Claire. Lief en Leed: Realisme en fantasie in Nederlandse familiegroepen uit de zeventiende en achttiende eeuw. Zwolle: Waanders Uitgevers, 2018. ISBN 9789462621930.

2023 Ekkart, Rudi; Muller, Eelke. Looted Art & Restitution: The Exodus and Partial Return of Dutch Art Property During and After World War II. Zwolle: Waanders Publishers, 2023. ISBN 9789462624986. van Asperen, Janneke; Vogelaar, Christiaan; Ekkart, Rudi. David Bailly: Time, Death and Vanity. Zwolle: Waanders Publishers / Leiden: Museum De Lakenhal, 2023. ISBN 9789462624634.

2024 Ekkart, Rudi; van den Donk, Claire. Johann George Schwartze: Uit de schaduw van zijn dochter. Zwolle: WBOOKS, 2024. ISBN 9789462586598.

Ekkart, Rudi; van den Donk, Claire. Wallerant Vaillant in Amsterdam. Zwolle: WBOOKS, 2024. ISBN 9789462586420.

Middelkoop, Norbert E.; Ekkart, Rudi E.O., eds. Frans Hals: Iconography – Technique – Reputation. Amsterdam: Amsterdam University Press, 2024. ISBN 9789048566068.

2025 Ekkart, Rudi; van den Donk, Claire. Mijn man zaligers liefhebberije: Portretten en schilderijen in het Hofje van Mevrouw van Aerden in Leerdam. Zwolle: WBOOKS, 2025. ISBN 9789462587281.