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Free standing columns that are widely spaced apart in a row. The term
is often used as an adjective when referring to a portico which projects
from the main structure.
Pseudodipteral
A temple which is like the dipteral temple except for omitting the in-
ner row of columns.
Pseudo-peripteral
Temple in which the columns surrounding the naos have had walls
built between them, so that they become engaged columns, as in the great
temple at Agrigentum. In Roman temples, in order to increase the size of
the celia, the columns on either side and at the rear became engaged col-
umns, the portico only having isolated columns.
Pteroma
In Classical architecture, the enclosed space of a portico, peristyle, or
stoa, generally behind a screen of columns.
Pycnostyle
Term given by Vitruvius to the intercolumniation between the col-
umns of a temple, when this was equal to 11/2 diameters.
Q
Quadriporticus
Also known as a quadriportico - a four-sided portico. The closest
modern parallel would be a colonnaded quadrangle.
Quoin
The cornerstones of brick or stone walls.
R
Rake
The diagonal outside facing edge of a gable, sometimes called
a raking cornice or a sloping cornice.
Rear vault
Vault of the internal hood of a doorway or window to which a splay
has been given on the reveal, sometimes the vaulting surface is terminated
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