Studied history at Karl-Franzenz-University Graz, PhD 2014. Research associate at the Institute of History (Contemporary History) at the University of Graz (2010-2017), at the House of Austrian History (2017-2019) and the Vienna Wiesenthal Institute for Holocaust Studies (2020-2021). External fellow at the Center Austria of the University of New Orleans (2013), curatorial activity at the Universalmuseum Joanneum. Lectureships at the Institute of History (Department of Contemporary History), Andrassy University Budapest, University of Klagenfurt, among others. Research focus on the cultural history of war, Nazi crimes and perpetrator research. 2021–2024 provenance researcher at the Academy of Fine Arts Vienna and since February 2024 at the Leopold Museum Private Foundation on behalf of the Commission for Provenance Research. Member of Arbeitskreis Provenienzforschung e.V.
Hans Ankwicz von Kleehoven, an art historian with a doctorate, joined the civil service as a concept trainee in the archive and library of the Imperial-Royal Ministry of Education in 1907. In 1912 he married the publicist and art critic Alexandra Sauer-Csáky von Nordendorf.