Designed by Wren, the layout is in the form of a Greek Cross divided by nine transverses and topped by a low central dome with four Corinthian columns. It was restored in 1843 but then damaged by fire in 1988. The church is well known for its wood panelling (but not all have been restored). There are many interesting details, in particular the pulpit decorated with garlands of fruit and flowers; access is gained by the splendid curved staircase (19C) by William Gibbs Rogers.