Lancet window

Tall, narrow window typically associated with the Gothic architectural style.

Garth

Small piece of enclosed ground.

Peristyle

Range of columns surrounding an architectural feature.

Ambulatory

General term for a covered walkway, and more specifically for the walkway linking the two chancel aisles behind the high altar.

Priest hole

Secret hiding places in the homes of prominent Catholics to hide priests from persecution.

Bell-cote

Shelter containing one or more bells.

Quoin


Any external angle or corner of a structure.

Apse

Semicircular or polygonal termination of the chancel, which is typically situated at the eastern end of a Christian church.

Spandrel

Roughly triangular space above and on either side of an arch.