About the building The Black Diamond

Det Kgl. Bibliotek's buildings on Slotsholmen, better known by the name The Black Diamond, are more than just a popular library. The buildings have a long history which everyone is welcome to explore.

The Black Diamond, day view at the quayside
Photo: Laura Stamer

Det Kgl. Bibliotek on Søren Kirekegaards Plads, Copenhagen extends across three very different buildings. Facing the water is The Black Diamond (1999), designed by the Danish architect group Schmidt Hammer Lassen Architects, in the centre of which Preben Hansen’s narrow extension (1968) stands, and at the back is H.J. Holm's historical library building from 1906, which is connected to the library garden.

Facts about The Black Diamond

  • The building is shaped like a sculptural monolith.
  • The building’s total volume is 20,733 m².
  • In all, it contains 450 rooms and 800 doors, all requiring a key, distributed on eight floors.
  • The front of The Black Diamond consists of 2,500 m² Absolute Black granite, mined in Zimbabwe and cut and polished in northern Italy. Each stone weighs 75 kg.