Historic Royal Palaces was established by the government in 1989 in order to care for five royal palaces. They later became an independent charity and in 2014 took over the management of Hillsborough Castle in Northern Ireland. The palaces host internationally important collections of fine and decorative art, the majority forming part of the Royal Collection. They manage, conserve, display and research their own collections of royal ceremonial dress, architectural drawings, art, archaeology, furniture, furnishings, architectural decoration and social history. They also work in partnership with the Royal Armouries to display their collections of arms and armour at the Tower of London.