. "After her death in 1940, the painting was inherited by her son Michael Ventris, who died in 1956. No further information is available on how the painting went from Galerie Berggruen in Paris to Galerie Nathan in Z\u00FCrich. In 1964, Werner Schmalenbach bought the painting from Galerie Nathan on behalf of the Kunstsammlung Nordrhein-Westfalen for 450,000 Deutschmarks."@en . .