In 1939 The Museum of Non-Objective Painting opened its rented quarters in Manhattan on East 54th Street, showcasing the collection of American and European abstract and nonobjective artwork that Solomon R. Guggenheim had begun assembling a decade before. In the seven decades since, the collection of the Solomon R. Guggenheim Museum—renamed in its founder's honor in 1952—has grown exponentially, expanding in both historical and stylistic range and depth. More