London Millennium Tower London Millennium Tower The London Millennium Tower was one of several ideas for the site of the former Baltic Exchange at 30 St Mary Axe, City of London that had been destroyed beyond repair by a Provisional IRA bomb blast. Designed by Foster & Partners, for then owner Trafalgar House, the plan was for the building to be the tallest in Europe and the sixth tallest in the world at that time, behind the twin Petronas Towers in Malaysia, the Sears Tower (now called the Willis Tower) in Chicago, and the twin towers of the World Trade Center in New
30 St Mary Axe of the building during the summer and warm the building in the winter using passive solar heating. The shafts also allow sunlight to pass through the building, making the work environment more pleasing, and keeping the lighting costs down. The primary methods for controlling wind-excited sways are to increase the stiffness, or increase damping with tuned/active mass dampers. To a design by Arup, its fully triangulated perimeter structure makes the building rigid enough without any extra reinforcements. Despite its overall curved glass shape, there is only one piece of curved glass on the building, the lens-shaped cap at the apex.