Maison La Roche and Maison Jeanneret (1923–24), also known as the La Roche-Jeanneret house, is a pair of semi-detached houses that was Le Corbusier's third commission in Paris. They are laid out at right angles to each other, with iron, concrete, and blank, white façades setting off a curved two-story gallery space. Maison La Roche is now a museum containing about 8,000 original drawings, studies and plans by Le Corbusier (in collaboration with Pierre Jeanneret from 1922 to 1940), as well as about 450 of his paintings, about 30 enamels, about 200 other works on paper, and a sizable collection of written and photographic archives. It describes itself as the world's largest collection of Le Corbusier drawings, studies, and plans.