News Register for our weekly news digest here . Piet Mondrian’s Composition with Blue , 1926. December 14, 2021 at 12:55pm Mondrian Heirs Sue Philadelphia Museum of Art over Painting Allegedly Stolen by Nazis Heirs of Piet Mondrian, who cofounded the De Stijl movement and coined the term neoplasticism , are suing the Philadelphia Museum of Art (PMA) for the return of a 1926 painting by the Dutch artist that they claim was looted by Nazis in 1937. Valued at more than $100,000, Composition with Blue entered the museum’s collection in 1952, after it was bequeathed to the institution by...