The Wallace Collection is an art collection in London open to the public, housed at Hertford House in Manchester Square, London, the former townhouse of the Seymour family, Marquesses of Hertford. It comprises a world-famous range of fine and decorative arts from the 15th to the 19th centuries with large holdings of French 18th-century paintings, furniture, arms & armour, porcelain and Old Master paintings arranged into 25 galleries.