St Paul's Cathedral familiar with the unique octagonal lantern tower over the crossing of Ely Cathedral, which spans the aisles as well as the central nave, unlike the central towers and domes of most churches. Wren adapted this characteristic in designing the dome of St Paul's. In section St Paul's also maintains a medieval form, having the aisles much lower than the nave, and a defined clerestory. The most notable exterior feature is the dome, which rises to the cross at its summit, and dominates views of the City. The height of 365 feet is explained by Wren's interest in astronomy. Until the
All Saints Cathedral Bells until about 1969, no person living has ever heard them ringing full circle in the English tradition, which gives a quite different (and more resonant) sound. The sound of bells pealing is also quite different from the bells of a carillon, which play melodies rather than the mathematical permutations entailed in "ringing the changes". The bells were removed immediately prior to the demolition of the tower in 1970. After the demolition of the Blacket Cathedral building and bell tower in 1970, the six Bathurst Cathedral Bells languished in the open on the grass behind the Bathurst Courthouse nearby. In 1988