The current building is the third theatre on the site, following disastrous fires in 1808 and 1856 to previous buildings. The façade, foyer, and auditorium date from 1858, but almost every other element of the present complex dates from an extensive reconstruction in the 1990s. The main auditorium seats 2,256 people, making it the third largest in London, and consists of four tiers of boxes and balconies and the amphitheatre gallery. The proscenium is 14.80 m wide and 12.20 m high. The main auditorium is a Grade I listed building.