The Turbine Hall and South Boiler House are the superb industrial buildings distinguished by their massive scale, fine proportions, inspiring interior space and delicacy of detail. In 2005 the North Boiler House was demolished and in its place a new structure built to accommodate the international headquarters of AngloGold Ashanti. The new structure is skilfully combined with the architecture of the Turbine Hall and the South Boiler House, to retain the aesthetic unity that was a distinguishing mark of the original complex of buildings.