Paris Fashion Week

PARIS — This week marks the ascension of four new designers at four vaunted houses: Anthony Vaccarello at Yves Saint Laurent, Bouchra Jarrar at Lanvin, Maria Grazia Chiuri at Christian Dior and Pierpaolo Piccioli, solo for the first time, at Valentino.

The avidity with which their debuts will be watched suggests one conclusion: The era of the brand caretaker is over. The star designer is back!