 The "hôtel particulier", owned by Doucet was designed by the architect Paul Ruaud.Laurens designed the fountain, Csaky designed Doucet's staircase, Lipchitz made the fireplace mantel and Marcoussis created a Cubist rug.A collector of art and literature throughout his life, by the time of his death he had a collection of Post-Impressionist and Cubist paintings, including "Les Demoiselles d'Avignon", which he bought direct from Picasso's studio, as well as two libraries' both of which he left to the French nation.