Diamond-faced rustication
Rustication (the exaggerated treatment of masonry to give an effect of strength), with the faces treated like shallow pyramids.
Repetitive surface decoration of lozenges or squares flat or in relief. Achieved in brickwork with bricks of two colours.
The upright part of a pedestal, i.e. between base and cornice.
Diocletian window
A semicircular window with two mullions, as used in the Baths of Diocletian, Rome. Also called a thermal window.
Discharging arch
An arch incorporated in a wall to relieve superimposed weight. Also called a relieving arch.
Of a porch or portico: having two columns.
Dog-leg stair
With parallel flights rising alternately in opposite directions, without an open well.
Ornament in the Early English period of Gothic, consisting of a series of small pyramids formed by four stylized canine teeth meeting at a point.
(Scots): Dovecote. A lectern type is free-standing with a single-pitch roof, a beehive type is circular and diminishes towards the top.
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The simplest and plainest of the three main classical orders, featuring a frieze with triglyphs and metopes. A Roman Doric column has a simple round capital with a narrow neck band and a plain or fluted shaft. A Greek Doric column has a thin spreading convex capital and no base to the column.