The clothing Lanvin made for her daughter began to attract the attention of a number of wealthy people who requested copies for their own children.

Soon, Lanvin was making dresses for their mothers, and some of the most famous names in Europe were included in the clientele of her new boutique on the rue du Faubourg Saint-Honoré in Paris.

[3] The living room, boudoir and bathroom of the apartment was reassembled in 1985 in the Musée des Arts Décoratifs, Paris.

To this day, Arpège perfume globe, designed by Rateau, are imprinted with Paul Iribe's gold image (rendered in 1907) of Lanvin and her daughter Marguerite.

Rateau also managed Lanvin-Décoration, an interior-design department established in 1920, in the main store on the rue du Faubourg Saint-Honoré.

Lanvin married Xavier Melet in 1907, a journalist at the newspaper Les Temps and later the French consul in Manchester, England.