The Senedd (Senate or Parliament; Welsh pronunciation: [ˈsɛnɛð]), also known as the National Assembly building, houses the debating chamber and three committee rooms for the National Assembly for Wales in Cardiff. The 5,308 square metres (57,100 sq ft) Senedd building was opened by Queen Elizabeth II on 1 March 2006 and the total cost was £69.6 million, which included £49.7M in construction costs. The Senedd is part of the National Assembly estate that includes Tŷ Hywel and the Pierhead Building.