Lanvin has opened it’s first New York store at 815 Madison Avenue. I must stop by when I’m in New York again. It looks opulent. And now it has one. Lanvin is poised to open at the end of the week its first location here at 815 Madison Avenue near 68th Street. The store will occupy 3,550 square feet and the first three floors of a 6,875-square-foot, five-story town house. The two upper floors will become the company’s corporate headquarters in September. “My dream when I started at Lanvin was to create this kind of luxury supermarket,†Elbaz said. “It would have everything you needed — T-shirts, bridal dresses, jeans, handbags, jewelry and shoes. I really believe the whole concept of going to a store when you need something. Women have enough. What I have to do is make their life easy. The product is all about dreams. In the store, everything is very clear.†Lanvin is planning to open a store in Beijing, Elbaz said, adding: “That will be the next project.†The company …