Slotsholmen (English: The Castle Islet) is an island in the harbour of Copenhagen, Denmark, and part of Copenhagen Inner City. Bishop Absalon constructed the city's first castle on the island in 1166-67 at the site where Christiansborg Palace, the seat of the Danish Parliament lies today. Sometimes referred to as 'the Island of Power', Slotsholmen houses many of the central institutions of the country. Apart from the parliament these include the Supreme Court, the Prime Minister's Office, the State Rooms of the Queen, the Ministry of Finance, and the historic buildings of the Christian IV's Stock Exchange, the Chancellery and the Royal Library. The National Archive and several museums are also located on the island.