 Isidore owned Paquin Lalanne et cie, a couture house which had grown out of a menswear shop in the 1840s.The couple renamed the company Paquin and set about building the business.In 1891, Jeanne and Isidore Paquin opened their Maison de Couture at 3 Rue de la Paix in Paris, next to the celebrated House of Worth.