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.

Robert Wilson, a visionary director and collaborator who worked with a diverse lineup of artists that included Philip Glass and Lady Gaga, died on Thursday. 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.