gallery or tribune: An upper story over theaisle which opens onto the nave or choir. It corresponds in length and width to the dimensions of the aisle below it.

Contrast with:triforium
See also: aisle, clerestory
Greek cross : A cross with four arms of equal length.

Compare with Latin cross
Greek key or meander: An ornamental motif consisting of continuous bands arranged in rectilinear forms.
See also other repetative decorative motifs

groin vault: A vault produced by the intersection at right angles of two barrel (tunnel) vaults. Sometimes the arches of groin vaults may be pointed instead of round.

See also: barrel vault

grotesque A marginal figure or animal, or hybrid combination of human and animal or plant, frequent especially in Gothic manuscript illumination and especially in marginal illumination.

ground plan or floor plan: Horizontal cross-section of a building as the building would look at ground level. A ground plan shows the basic outlined shape of a building and, usually, the outlines of other interior and exterior features.

Compare with cross section.