Plaster.—The plastic material, of which the groundwork is lime and sand, used to cover walls internally and to form ceilings. Sometimes employed as a covering to walls externally.
Plinth.—The base of a wall or of a column or range of columns.
Portal.—A dignified and important entrance doorway.
Portico.—A range of columns with their entablature (and usually covered by a pediment), marking the entrance to a Renaissance or Classic building.
Prismatic Rustication.—In Elizabethan architecture rusticated masonry with diamond-shaped projections worked on the face of each stone.
Profile.—The contour or outline of mouldings as they would appear if sawn across at right angles to their length.
Porch.—A small external structure to protect and ornament the doorway to a building (rarely met with in Renaissance).
Quatrefoil.—A four-leaved ornament occupying a circle in tracery or a panel.
Rafters.—The sloping beams of a roof upon which the covering of the roof rests.
Ragstone.—A coarse stone found in parts of Kent and elsewhere, and used for walling.