One Bay of Choir, Lichfield Cathedral
Lichfield Cathedral is situated in Lichfield, Staffordshire, England. It is the only medieval English cathedral with three spires. Architecturally, the choir (alt. spelling quire) is the area of a church or cathedral, usually in the western part of the chancel between the nave and the sanctuary (which houses the altar). A bay is a module in classical or Gothic architecture, the distance between two supports of a vault or the unit of an opening and its framing on a façade.
A. D. F. Hamlin College Histories of Art History of Architecture (New York, NY: Longmans, Green, and Co., 1915)