French fashion designer Thierry Mugler dead at 73

French fashion designer Manfred Thierry Mugler, whose dramatic designs were worn by celebrities like Madonna, Lady Gaga and Cardi B, has died. He was 73.

He died Sunday, his official Instagram account said. “May his soul Rest In Peace,” it said in a post that was all black with no image. It did not give a cause of death.

Mugler, who launched his brand in 1973, became known for his architectural style, defined by broad shoulders and a tiny waist. The use of plastic-like futuristic fabric in his sculpted clothing became a trademark.

He defined haute couture over several decades,