A pair of antique oval biscuit porcelain miniatures depicting the relief busts of Catherine the Great and Mary Antoinette housed in gilded bronze frames. Marked in blue ink on the back. Dating from the second half of the 18th century. The Manufacture nationale de Sèvres is one of the principal European porcelain factories. It is located in Sèvres, Hauts-de-Seine, France. It is the continuation of Vincennes porcelain, founded in 1740, which moved to Sèvres in 1756. It has been owned by the French crown or government since 1759, and has always maintained the highest standards of quality. Almost immediately, it replaced Meissen porcelain as the standard-setter among European porcelain factories, retaining this position until at least the 19th century. Decorative Art For Collectors, French Sevres Porcelain Antiques And Collectibles.