Designer Thomas Heatherwick has unveiled these two 11m-high sculptures in Paternoster Square.
The artworks, which have been likened to 'angel's wings', also act as cooling vents for a London Electricity substation. Heatherwick developed the design through experimenting with the repetition of isosceles triangles to form a complex helical form. The 'wings'are constructed from stainless steel which has been blasted with tiny glass beads to create a satin finish. Stanhope and Mitsubishi Estates commissioned the sculpture as a new focus for Bishop's Court, at the western end of the square.