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clerestory =
An upper zone of wall
pierced with windows
that admit light to the
center of a lofty room.
triforium =
A shallow passage
above the arches of
the nave below the
clerestory.
pier arch =
An arch resting on
piers, esp. one along a
nave arcade, below
the triforium.
column =
A cylindrical
support con-
sisting of a
base (except
in
Greek
Doric), shaft
and capital;
either mono-
lithic or built
up of drums
the full di-
ameter of the
shaft to sup-
port a load.
clerestory
column order