Ellsworth Kelly speaks during a press preview at the The Barnes Foundation Tuesday, April 30, 2013, in Philadelphia. The foundation presents its first contemporary art exhibition in 90 years and its first ever artist solo exhibition with a display of wall sculptures by Ellsworth Kelly, who celebrates his 90th birthday in May. The show marks the return of “Sculpture for a Large Wall,” which was created for a Philadelphia high-rise in 1957 and shocked the local arts community when it was removed and donated to the Museum of Modern Art in New York. (AP Photo/Matt Rourke)