YSL

In 1966, Yves Saint Laurent took the tuxedo, a man's jacket, built for a smoking room, and cut it for a woman. He kept the masculine codes and adapted them to her body: the waist drawn in, the leg lengthened, the lapel left sharp. Only one sold to couture. But downstairs at Rive Gauche, his ready-to-wear line, the younger women indulged. Le Smoking was the first time a couturier put women in trousers for evening. He followed it with his first pantsuit in spring 1967, and kept a tuxedo in every collection until 2002. This is where modern suiting & tailoring comes from: menswear reclaimed.