Windsor and Royal Borough Museum is a local history museum, exploring the history of the town of Windsor and the Royal Borough of Windsor & Maidenhead, in the English county of Berkshire. It is accommodated within Windsor Guildhall which is a Grade I listed building. The museum is managed as part of the local authority of the Royal Borough of Windsor & Maidenhead. The first museum exhibition was opened in Windsor Guildhall in 1951 as part of the Festival of Britain celebrations by Princess Elizabeth. The Queen returned to the building in 2011.