The roughly $3 billion art collection of Greek shipping executive Basil and Elise Goulandris is at the center of a 16-year family feud, including Joan Miro’s 1926 ‘The Grasshopper.’ Mr. Goulandris bought this surrealist painting in 1972 and his relatives say he sold it in 1985, a sale his niece Aspasia Zaimis disputes. A 1993 Miro show catalog from New York’s Museum of Modern Art listed the work as coming from the collection of Ms. Goulandris. © Successió Miró/ARS, NY/ADAGP, Paris