abstract:A triforium is a shallow arched gallery within the thickness of inner wall, which stands above the nave of a church or cathedral. It may occur at the level of the clerestory windows, or it may be located as a separate level below the clerestory.
Theplanswouldalsoallowvisitorsfor the first timeinto the triforium, a spectacular if dustysecretworld 70ftabove the nave, with a view described by John Betjemanas "the best in the world".