30 St Mary Axe (widely known informally as The Gherkin and 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 storeys, it is 180 metres (591 ft) tall. Print the building and the ring, and put the ring on the top of the building and slide it on.