On Tuesday , Feb. 26, t he second day of Paris Fashion Week, the city will wake up to 4,000 posters of Carine Roitfeld. The placards show her completely naked, looking out a window and making a peace sign with one hand.

They will be placed in hot spots all over the city. No model, fashion editor or tourist will be able to escape them. A team has been hired to put up new posters if the first ones are vandalized or covered up.

Ms. Roitfeld, 64, has long been a ubiquitous force during the shows here. As the editor in chief of Vogue Paris for 10 years and, later, the founder of CR Fashion Book, she was a front-row regular. Her parties are known for being the most exclusive and elaborate, attracting celebrities like Lady Gaga and Kim Kardashian West.

But in those roles she was still somewhat in the background: an editor and influencer, not the main event. Now that’s about to change.