The current Chancellery building (opened in the spring of 2001) was designed by Charlotte Frank and Axel Schultes and was built from concrete and glass in an essentially postmodern style, though some elements of modernist style are evident. Occupying 12,000 square meters (129,166 square feet), it is also the largest government headquarters building in the world. By comparison, the new Chancellery building is ten times the size of the White House A semi official Chancellor apartment is located on the top floor of the building. The 200 square meter two-room flat has thus far only been occupied by Gerhard Schröder; current Chancellor Angela Merkel prefers to live in her private apartment in Berlin.
Because of its distinctive but controversial architecture, journalists, tourist guides and some locals refer to the buildings as Kohllosseum (as a mix of Colosseum and former chancellor Helmut Kohl under whom it was built), Bundeswaschmaschine (federal laundry machine, because of the round-shaped windows and its cubic form), or Elefantenklo (elephant loo).