Analysis of information sources in references of the Wikipedia article "Julius Schnorr von Carolsfeld" in English language version.
The Gallery first became aware of Marianne Schmidl's tragic fate and the duress attending the sale of her family's drawing collection from restitutions to her family announced by European institutions, including the Albertina in Vienna (2013), the Staatliche Museen zu Berlin (2014), and the Kupferstich-Kabinett, Dresden (2015). Subsequent research by Nancy Yeide, head of the department of curatorial records and the Gallery's World War II provenance research expert, confirmed the circumstances of the sale of the drawings by Schmidl.