The Savonnerie manufactory was the most prestigious European manufactory of knotted-pile carpets, enjoying its greatest period c. 1650–1685; the cachet of its name is casually applied to many knotted-pile carpets made at other centers. The manufactory had its immediate origins in a carpet manufactory established in a former soap factory (French savon) on the Quai de Chaillot downstream of Paris in 1615 by Pierre DuPont, who was returning from the Levant.