City of London skyline, 30 St. Mary Axe building on the right, London, England

The City of London financial district skyline showing the Scalpel building (52-54 Lime Street) and the Gherkin (30 St. Mary Axe), London, England, United Kingdom, Europe

Financial district skyscrapers, including 30 St. Mary Axe, known as the Gherkin, City of London, London, England, United Kingdom, Europe

Financial district skyscrapers, including 30 St. Mary Axe, known as the Gherkin and the Leadenhall Building known as the Cheesegrater, City of London, London, England, United Kingdom, Europe

Aerial view of Tower 42, Gherkin (30 St. Mary Axe) (Swiss Re Building) and St. Helen's (Aviva Tower), City of London, London, England, United Kingdom, Europe

30 St Mary Axe (The Gherkin) with St. Andrew Undershaft church, City of London, England, United Kingdom, Europe

Aerial image of the Swiss Re Building (30 St. Mary Axe) (Gherkin), City of London, London, England, United Kingdom, Europe

City of London and the River Thames, 30 St. Mary Axe building on the right, London, England

Tower of London, UNESCO World Heritage Site, and the Gherkin (30 St. Mary Axe), City of London, London, England, United Kingdom, Europe

City of London skyline with The Tower of London, the Gherkin, Scalpel and Twenty Two Bishopsgate, the tallest building in the City, London, England, United Kingdom, Europe

City of London skyline with The Tower of London, the Gherkin, Scalpel and Twenty Two Bishopsgate, the tallest building in the City, London, England, United Kingdom, Europe

The Gherkin (30 St. Mary Axe) building, City of London, London, England, United Kingdom, Europe

Lloyds Building on the left, with The Gherkin (30 St. Mary Axe) in the background, City of London, London, England, United Kingdom, Europe

The Gherkin, 30 St. Mary Axe, designed by Norman Foster, City of London, London, England, United Kingdom, Europe

Aerial view of the City from the top of the Shard showing River Thames, London Bridge, 30 St. Mary Axe (The Gherkin), Tower 42, the Willis Building, and Moorhouse, London, England, United Kingdom, Europe

City centre with skyscrapers, 20 Fenchurch Street, Leadenhall Building and 30 St Mary Axe or The Gherkin, Thames, London, England, United Kingdom, Europe