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Dikka
Islamic architectural term for the tribune raised upon columns, from
which the Koran is recited and the prayers intoned by the Imam of the
mosque.

Dipteral
Temples which have a double range of columns in the peristyle, as in
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the temple of Diana at Ephesus.
Distyle
Having two columns

An architectural term for a portico having two columns between
two anta

Dodecastyle
Temple where the portico has twelve columns in front, as in the por-
tico added to the Temple of Demeter at Eleusis, designed by Philo, the ar-
chitect of the arsenal at the Peiraeus.

Doric order
One of the three orders or organizational systems of Ancient Greek or

classical architecture characterized by columns which stood on the flat
pavement of a temple without a base, their vertical shafts fluted with paral-
lel concave grooves topped by a smooth capital that flared from the col-
umn to meet a square abacus at the intersection with the horizontal beam

that they carried.

Dormer
A structural element of a building that protrudes from the plane of a
sloping roof surface. Dormers are used, either in original construction or as
later additions, to create usable space in the roof of a building by adding

headroom and usually also by enabling addition of windows.
Dosseret, or impost block

Cubical block of stone above the capitals in a Byzantine church, used
to carry the arches and vault, the springing of which had a superficial area
greatly in excess of the column which carried them.

Dromos
Entrance passage or avenue leading to a building, tomb or passage-
way. Those leading to beehive tombs are enclosed between stone walls and

sometimes in-filled between successive uses of the tomb. In ancient Egypt
the dromos was a straight, paved avenue flanked by sphinxes.

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