Standing approximately 306 metres (1,004 ft) high, the Shard is currently the tallest building in the European Union. It is the second-tallest free-standing structure in the United Kingdom, after the concrete tower at the Emley Moor transmitting station. The glass-clad pyramidal tower has 72 habitable floors, with a viewing gallery and open-air observation deck – the UK's highest – on the 72nd floor, at a height of 244.3 metres (802 ft). It was designed by the Italian architect Renzo Piano and replaced Southwark Towers, a 24-storey office block built on the site in Southwark in 1975. The Shard was developed by Sellar Property on behalf of LBQ Ltd and is jointly owned by Sellar Property and the State of Qatar.