Victoriana is a subject which has been rising in many collections this season (just why is one of fashion’s mysteries). It crystalized as a moment that can only be described as sublime at Givenchy. Riccardo Tisci’s breathtaking configurations of velvet, lace, chiffon, and beading took ready-to-wear fashion to a level that reminded the audience of his abilities as a designer who has Parisian couture know-how in his fingertips—and of his consciousness of youth culture, which comes as second nature. “Chola Victorian,” he declared backstage. “She’s the boss of the gang.”