The gothic St Paul's Cathedral , a little way along from the Victoria Memorial, was erected by Major W.N. Forbes in 1847. Measuring 75m by 24m, its iron-trussed roof was then the longest span in existence. For improved ventilation, the lancet windows inside extend to plinth level, and tall fans hang from the ceiling. The most outstanding of the many well-preserved memorials and plaques to long-perished imperialists is the stained glass of the west window, designed by Sir Edward Burne-Jones in 1880 to honour Lord Mayo, assassinated in the Andaman Islands. The original steeple was destroyed in the 1897 earthquake; after a second earthquake in 1934 it was remodelled on the Bell Harry Tower at Canterbury Cathedral.