Wallace Collection the largest, most important and extant collection of French 18th-century decorative arts in the world, rivalled only by the triumvirate of the Musée du Louvre, Château de Versailles and Mobilier National in France. The Wallace Collection is a non-departmental public body and admission is free. The Wallace Collection is a museum which displays the works of art collected in the 18th and 19th centuries by five generations of a British aristocratic family – the first four Marquesses of Hertford and Sir Richard Wallace, the illegitimate son of the 4th Marquess. In the 19th century, the Marquesses of Hertford were one
Marquess of Donegall and on his death in 1883 the barony of 1841 became extinct. He was succeeded in his other titles by his younger brother, the fourth Marquess. On the death of his grandson, the sixth Marquess, in 1975, the line of the second Marquess failed. The late Marquess was succeeded by his kinsman the fifth Baron Templemore (see below), who became the seventh Marquess. From 1975 until 1999, when most hereditary seats were abolished with the passage of the House of Lords Act 1999, the Marquess sat in the House of Lords as "Baron Fisherwick" in the Peerage of Great Britain.