Otto Wachenheim was a Jewish art collector who fled to the USA in 1939.

Otto Wachenheim (1885–1969) was a German-born individual who lived in the Netherlands from 1923 until his emigration to the United States in 1939. Wachenheim was known for his significant wealth, which included a notable art collection comprising Impressionist and Modernist works. His art collection and other possessions remained in his Amsterdam residence, which was seized by German authorities after the occupation of the Netherlands in 1940. The artworks and furniture were likely looted and disappeared in 1944 when the house was vacated by the occupying forces. After World War II, Wachenheim made several attempts to recover his lost collection, but these efforts were unsuccessful. In 2009, his description of a painting titled book still life was registered in the Lost Art database, which led to the identification of the work by artist Oskar Moll in Görlitz.^[1]

In 2025, a settlement was reached between the Wachenheim heirs and the Silesian Museum in Görlitz for a Nazi-Looted Painting by Oskar Moll, "Aechmea fasciata with Books and Centennial Hall [Untitled]" (1926).^[1]

The Wachenheim heirs have registered search requests for twelve artworks on the German Lost Art Foundation database^[2] and the ERR database lists thirteen.^[3]