The Wallace Collection is a museum in London, with 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.
It was established in 1897 from the private collection mainly created by Richard Seymour-Conway, 4th Marquess of Hertford (1800–1870), who left it and the house to his illegitimate son Sir Richard Wallace (1818–1890), whose widow bequeathed the entire collection to the nation. The museum opened to the public in 1900 in Hertford House, Manchester Square, and remains there, housed in its entirety, to this day. A condition of the bequest was that no object ever leave the collection, even for loan exhibitions. Admission is free. It is a non-departmental public body.