30 St Mary Axe, also known as the Swiss Re Tower or the Gherkin, is a skyscraper in London’s main financial district, the City of London; completed in December 2003 and opened on 28 April 2004. It is 180-metres (591-foot) in height, with 40 floors. Its construction symbolised the start of a new high-rise construction boom in London. It was subsequently followed by the Willis Building in 2007 and the Broadgate Tower in 2008. The construction of tall buildings has continued, with skyscrapers Heron Tower, the Leadenhall Building, the "Walkie Talkie" and Bishopsgate Tower ("Pinnacle") which, upon completion will become the City’s tallest building at 288 metres.