The Royal Library in Copenhagen (Det Kongelige Bibliotek) is the national library of Denmark.
In 1999, a new building adjacent to the old one was opened at Slotsholmen, known as the "Black Diamond" (Den Sorte Diamant). The Black Diamond building was designed by Danish architects schmidt hammer lassen. Named for its outside cover of black marble and glass, it houses a concert hall in addition to the library. (Location: [show location on an interactive map] 55°40′25.5″N 12°34′55″E / 55.67375°N 12.58194°E / 55.67375; 12.58194.)
This new building was opened 1999. It is formed by two black cubes that are slightly tilted over the street.
The atrium's exterior wall is made of glass, so you can see the sea and, in the other shore, Christianshavn's luxury buildings.
Three bridges connect the Black Diamond with the old part of the Royal Library. In the ceilling of the big bridge there is a huge painting by Danish painter Per Kirkeby.