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Round or oval openings, such as windows in a wall or openings
in the crown or drum of a dome. In Gothic clerestory window
design, an oculus with bar or plate tracery is usually located
above the lancet windows.
A delicate form of an arch with a pointed apex, formed by
the intersection of two S curves used for decorative rather
than structural purposes. Ogee arches were used only in the
late Gothic period.
Images or patterns composed of individually shaped pieces
of durable material, usually stone or glass, which form the
design or pattern. Distinguished from "mosaics" which are
compositions composed of numerous small pieces of glass or
A standing figure with arms raised, the conventional gesture
of prayer in the Early Christian period.
A specific ensemble of column (including base and capital)
with an entablature characterized by distinctive forms and
details. In Classical architecture, the three principal orders
are Doric, Ionic and Corinthian.
A projection from the upper story of a building. Oriels may
often contain windows.
The geographical position of a building according to the points
of the compass. Most Christian churches are oriented on an
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