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.

Celebrated US director Robert Wilson, who revolutionized stage and opera, died Thursday at the age of 83, his management said."Robert Wilson died peacefully today in Water Mill, New York, at the age of 83,