Christian Dior introduced the revolutionary "New Look" in 1947, which transformed womenswear after the austerity of World War II. His groundbreaking designs were characterized by narrow waists and voluminous skirts, and brought opulence and femininity back to women's fashion, making the brand a symbol of sophisticated elegance. After Dior's untimely death in 1957, Yves Saint Laurent took over as head designer at the age of 21. Saint Laurent's tenure at Dior was short-lived but incredibly influential. He introduced modern and daring designs and challenged traditional notions of fashion, so much so that Dior's backers replaced him with Marc Bohan in 1960. Bohan brought a sense of refined simplicity to Dior for nearly three decades. His designs emphasized clean lines, classic silhouettes, and subtle elegance, and appealed to the tastes of Dior's discerning clientele. In 1989, Italian designer Gianfranco Ferré was appointed creative director of Dior. Ferré incorporated architectural elements into his designs, creating structured and sculptural pieces that embodied powerful femininity. Philippe Guibourgé designed the younger ready-to-wear line Miss Dior that was launched in 1967.