The medium of porcelain became a focus of French rococo design thanks to the enthusiasm of Madame de Pompadour. She convinced Louis XV of the international prestige to be gained by a French manufactory that could develop an innovative rococo line to challenge the German production of the Saxon court at Meissen. Louis invested in a fledgling porcelain enterprise, then located in the abandoned fortress of Vincennes, constructed new premises at Sèvres in 1756, and finally bought the enterprise outright in 1759.