3XN is a Danish architecture practice headquartered in Copenhagen, with offices in Stockholm, London, New York and Sydney. It was founded in Aarhus in 1986 as Nielsen, Nielsen & Nielsen by Kim Herforth Nielsen, Hans Peter Svendler Nielsen and Lars Frank Nielsen, and is now led by five senior partners with Kim Herforth Nielsen as creative director. Its international breakthrough came in the late 1990s with the Danish Embassy in Berlin and the competition for the Muziekgebouw in Amsterdam.
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The Muziekgebouw aan 't IJ in Amsterdam (2005) is Amsterdam's main hall for contemporary classical music, built over the IJ tunnel. Ørestad Gymnasium in Copenhagen (2007) turns four boomerang-shaped floors around one another to make a school of open study spaces instead of closed classrooms. The Bella Sky Hotel in Copenhagen (2011) is two towers, 76.5 metres high, leaning 15 degrees in opposite directions. Den Blå Planet (National Aquarium Denmark) (2013) and Quay Quarter Tower in Sydney (2022) are among its later works. 3XN's projects are studied for how a building's form can shape the way people meet and learn.
Muziekgebouw aan 't IJ2005 · Amsterdam
Bella Sky Hotel2011 · Copenhagen
Forskaren2024 · Stockholm
Ørestad Gymnasium2007 · Copenhagen
Den Blå Planet (National Aquarium Denmark)2013 · Kastrup
Quay Quarter Tower2022 · Sydney