Cell A small chamber or room, often used of the small detached buildings that are found in Celtic monasteries. Chamfer Surface produced by cutting across a square angle of a block at 45 to the other surfaces. The area at the E end of the church in which the altar is usually located. Normally used to describe the area E of the crossing that continues the line of the nave. Often narrower than the nave.
Chancel arch is the arch dividing the nave from the chancel.
Chevron Zig-zag pattern, normally on carved moulding. Clerestory Upper storey of the nave walls of the church, lit by windows. Corbel Block of stone projecting from a wall, usually to support a beam, or some other feature. Crypt Underground room, usually at E end of church. Curtain A connecting wall between towers.