Corporate Wallace Collection 1900- The Wallace Collection comprises art collected in the 18th and 19th centuries by the first four Marquesses of Hertford and Sir Richard Wallace, the son of the 4th Marquess. It was given to the nation in 1897. The Wallace Collection opened as a national museum in 1900 in Hertford House, London. national museum GB/366/1467 15/09/2009 Mkklibyz 15/09/2009 Mkklibyz Wallace Collection; 1900-; national museum Wallace Collection c0504b7a-b712-45da-8b70-9b4068e5ae31