 The architect was L.A. Boileau, and the framework was of iron, with large glass windows for displays.The building was hardly finished before it was enlarged again, designed by Boileau with the help of the engineering firm of Gustave Eiffel.Boucicaut met his future wife, Marguerite Guérin, who was working at a nearby creamery where Boucicaut had his coffee each morning.