Lanvin is a fashion houseFrench , founded in 1889 in Paris by the stylist and designerJeanne Lanvin . The company is the oldest of its time still operating in the country. Some of the most famous names in Europe made up the clientele of her boutique on the Rue du Faubourg Saint-Honoré in Paris. Jeanne Lanvin became One of the most influential designers of the 1920s and 1930s, and her brand still retains this prestige today.