St. Paul's Cathedral, London

The practice has undertaken a £40 million restoration, extending to virtually every part of Wren’s magnificent building. The entire interior and exterior have been cleaned. Much of the stone became blackened during the cathedral’s 33-year construction, so this is the first time that the building can be seen as Wren intended. The crypt has been completely reorganized to provide a shop, refectory, café, WCs, conference facilities, choir practice rooms and new education facilities.