From 1959 onwards there was renewed building work designed to transform the former parish church into a cathedral building. Between 1959 and 1970, the Victorian chancel was demolished and replaced with a new quire, a cloister was added on the west side; also transepts, a Lady chapel and a side chapel dedicated to St Edmund were built. The cathedral architect from 1943 to 1988 was Stephen Dykes Bower and he left £2 million for the completion of the cathedral. In the cathedral grounds a new choir school and visitor's centre, which were opened in 1990, were built by Dykes Bower's successor, Alan Rome. Work started on a Gothic revival style tower in 2000; funded by the Millennium Commission, the Stephen Dykes Bower Trust and others, the Millennium Tower was designed by Hugh Mathew, an associate of Dykes Bower. The 150 foot (46 metre) structure was built from 600,000 bricks and faced with Barnack and Clipsham stone. Its completion was officially celebrated on 22 July 2005. Further additions are the Chapel of the Transfiguration and the East Cloister, both completed in 2009, and the Crypt Treasury in 2012.