Just incredible:
Barki, a researcher at the Hungarian National Gallery in Budapest, is writing a biography of the artist and recognized the painting from the last known record of it: a black and white photograph taken at an exhibition in Hungary in 1928. It was bought at that exhibition by an unknown person, perhaps someone Jewish who fled the country before or during World War II. In the chaos of war and its aftermath, Sleeping Lady with a Black Vase disappeared.
via The History Blog