The Crystal, a Sustainable Cities Initiative by Siemens, has opened in London. Conceived by Wilkinson Eyre Architects, the dramatic crystal-shaped, glazed structure has created a new independent global hub for debate on sustainable urban living and development. The 6,300 sq m building – which houses exhibition spaces, conference facilities and a technology and innovation centre – has been designed to achieve the highest international sustainability credentials for a building (BREEAM Outstanding and LEED Platinum).