30 St Mary Axe 30 St Mary Axe 30 St Mary Axe (known previously as the Swiss Re Building) is a commercial skyscraper in London's primary financial district, the City of London. It was completed in December 2003 and opened in April 2004. With 41 floors, it is tall and stands on the former sites of the Baltic Exchange and Chamber of Shipping, which were extensively damaged in 1992 by a bomb placed by the Provisional IRA in St Mary Axe, a narrow street leading north from Leadenhall Street. After plans to build the 92-storey Millennium Tower were dropped, 30 St Mary Axe was
St. Helen's (skyscraper) Axe, in the City of London, which it desired to develop as its new headquarters. The site comprised adjacent properties in St Mary Axe and the former Shell building in Great St Helens. At the same time the Peninsular and Oriental Steam Navigation Company was planning to redevelop its city offices in Leadenhall Street. Due to a number of issues affecting both sites, notably poor access to the Commercial Union site and the restricted width of the Peninsular and Oriental site, it was not possible to obtain planning consents that would optimise the amount of floor space desired by either