Robert Wilson, a leader in avant-garde theater who collaborated with Philip Glass, David Byrne and Lady Gaga over his six-decade career, has died. He was 83.

He upended theatrical norms with his own stunningly visualized works and his collaborations with a wide range of artists, from Philip Glass (“Einstein on the Beach”) to Lady Gaga.

Robert Wilson, an experimental theater stage director, playwright, founder and artistic director of The Watermill Center, died on July 31. He was 83. Wilson's death was confirmed on his personal website.