30 St Mary Axe Architecture
30 St Mary Axe was designed by architects Norman Foster and the Arup Group. The tower's elongated curved shaft with a rounded end brings to mind the shape of a stretched egg. The building is clad with glass panels uniformly to the exterior with rounded corners with a lens-like dome at the top forming an 'observation deck'. The triangulated perimeter structure gives the building rigidity without needing extra reinforcements.