The highlight of Paris’ Haute Couture Fashion Week was not on the catwalk this year but in the wing of the Louvre that houses the Musée des Arts Décoratifs, where a retrospective paid tribute to 70 years of Dior in its exhibit “Designer of Dreams.” Christian Dior, who began his career as an esteemed art dealer, only turned to fashion after his family’s business went bankrupt and his gallery failed in the economic tumult of the 1930s. A talented sketcher, he drew designs for Lucien Lelong to pay ...