Danish architecture studio 3XN has revealed the aptly named Berlin Cube office block alongside the River Spree and the central railway station in German's capital city.
Built on Washingtonplatz in central Berlin, the standalone office block is shaped like a cube with faceted glass facades. It completes a masterplan for the area drawn up by German architect OM Ungers in the mid-1990s.
Clad entirely in glass, the cube measures 42.5 metres in all directions. Its facade is faceted with a triangulated relief pattern to create outdoor balconies for the offices on every floor within the block.
The 10-storey office block contains a food market and lobby on the ground floor with nine floors of office space above and a roof terrace at the top of the building.
Although the building is entirely clad in glass, 3XN utilised a double-skin facade, cross ventilation, rooftop solar panels and an automated heating and ventilation system in a bid to prove that glazed buildings can be energy efficient.
Berlin Cube is 25 per cent more energy efficient than well-known green building standards require.
