Dr. Agnes Thum studied art history, ethnology, and modern German literature at Ludwig Maximilian University of Munich and received her doctorate in 2014. She has been working in the field of provenance research and object research since 2006; since 2014, she has headed the Provenance Research and Restitution Department at the Ketterer Kunst auction house in Munich. She has held teaching positions in the field of provenance research at the University of Augsburg, the University of Passau, and in the continuing education program in provenance research at Freie Universität Berlin.

Dr. Stephan Klingen completed his studies in art history, archaeology, and folklore at the University of Bonn, earning his doctorate. Under a contract for services, he compiled a critical inventory catalog of the collection of German paintings at the Anhaltische Gemäldegalerie in Dessau in 1994–95. In 1995, he joined the Central Institute for Art History in Munich, where he played a key role in digitizing the library’s catalog and subsequently took over as head of IT. In 1999, he was also entrusted with responsibility for the institute’s photo library, which, with approximately 900,000 media items, ranks among the largest photographic research collections on European art history from the Middle Ages to the present. Drawing on the diverse holdings, Klingen developed numerous projects in the fields of digital humanities and provenance research. In 2024, he concluded his tenure at the Central Institute for Art History and has since served as a consultant.

Sabine Disterheft studied art history and archaeology at the University of Cologne. Since 2018, she has been working as a freelance provenance researcher for various clients, and since 2022, she has also held a full-time position in the Provenance Research Department at Ketterer Kunst in Munich. Her research interests also extend to the field of collection history.

Carolin Faude-Nagel is a freelance provenance researcher and, since October 2023, has also held a permanent position at the Ketterer Kunst auction house. She completed her studies in art history and law in Mainz in 2012. Since then, Carolin Faude-Nagel has specialized in provenance research, art forgery, GDR cultural policy, and genealogy, and she investigates the provenance of artworks on behalf of public institutions, renowned auction houses, and private collections to determine whether they were confiscated as a result of Nazi persecution. She also works in the areas of heir tracing and authentication research.

Dr. Katharina Thurmair studied art history as well as French and Italian literature at Ludwig Maximilian University in Munich; she earned her doctorate
with a dissertation on idealist aesthetics and Symbolist art in 19th-century France. She subsequently gained diverse experience at research institutions, museums, and in the publishing industry in Germany, France, and Italy. Since 2019, Katharina Thurmair has been working for Ketterer Kunst in provenance research; until 2025, she will also be involved in scholarly cataloging.