Ivan Morozov's great-grandson sued Yale and the Met for a Van Gogh and a Cézanne seized by the Bolsheviks, and lost both cases

Ivan Morozov, a Moscow industrialist, built a modern art collection that ranked among the finest in Europe. In 1911 he bought Cézanne's Madame Cézanne in the Conservatory. He also owned Van Gogh's The Night Café of 1888. In December 1918 the Bolshevik government decreed his collection state property and paid nothing. Morozov left Russia in 1919 and died in July 1921^†. The Soviet state hung The Night Café in its Moscow Museum of Modern Western Art from 1928 and sold it abroad in 1933. That year the American collector Stephen Clark acquired both paintings. Clark died in 1960. His will left The Night Café to Yale, which accessioned it in June 1961, and the Cézanne to the Metropolitan Museum, where he had been a trustee. Pierre Konowaloff became the official heir to Morozov's estate in 2002. In 2008 his wife wrote to Yale, and Yale sued to quiet its title. In 2010 he demanded the Cézanne from the Met and sued when it refused. Both claims failed on the act of state doctrine. The Second Circuit affirmed against him on 18 December 2012 (the Met) and 20 October 2015 (Yale), and the Supreme Court refused to hear him on 17 June 2013 and 28 March 2016. In 2026 The Night Café hangs at the Yale University Art Gallery and the Cézanne at the Met.