Altar. They are mostly found on the sides of the chancel
arch, and are frequently called _hagioscopes_.

STOUP A vessel for consecrated water, at or near the entrance
to a church.

STRING or
STRING COURSE. A horizontal projecting band of stone in the wall of a
building.

STRUT See Brace.

TOOTH
ORNAMENT An ornament used almost exclusively in the E.E. style,
resembling a square four-leaved flower, and thought to
be based on the dog-tooth violet.

TRANSOM A horizontal cross-bar in a panel or window.

TRACERY The ornamental stonework in the upper part of a window;
when formed by the mullions it is called bar tracery
and when the spandrel is pierced, plate tracery. Also
used largely on tombs, screens, doorways, etc.

TRANSEPTS The projecting arms of a cruciform church, often wrongly
called "cross-aisles."

TRANSITION A term used to describe the process of change from one
style of architecture to another. The three great periods
of transition are from the Romanesque and Norman to the
Early English; the Early English to the Decorated, and
the Decorated to the Perpendicular.

TREFOIL An ornamental foliation in the heads of windows, panels,
etc., in which the spaces formed by the cusps resemble
three leaves.

TRIFORIUM or Blind-Storey. An open gallery or arcade without
windows immediately above the pier arcade and under the
roof of the aisle.

TYMPANUM The space between the top of a square-headed door and the
arch above it; frequently sculptured.

VAULT Roofing of stone constructed on the principle of the
arch, the intersections of which are termed groins and
are in the pointed styles usually ribbed.

VAULTING
SHAFTS Small shafts sometimes rising from the floor, sometimes
from the capital of a pillar and sometimes from a corbel,
and intended as supports for the ribs of a vault.

VESICA PISCIS An oval shape or figure formed by two equal circles
cutting each other in their centres. Very commonly found
on episcopal and monastic seals.