A cathedral was a type of church. As Professor Richard Lazarus told Tish Jones, Southwark Cathedral was one of the oldest churches in London. (TV: The Lazarus Experiment)
Gloucester had a cathedral. (TV: Fugitive of the Judoon)
Ian Chesterton likened the console room of a Diplomatic TARDIS to a cathedral. (AUDIO: Sphere of Influence)
Iris Wildthyme and Panda visited a palimpsest-style cathedral, and they became part of a bootstrap paradox. (PROSE: Iris Wildthyme and the Unholy Ghost)