dado: Lower part of an interior wall, often decorated with arcading.
depressed arch: A flattened arch, slightly pointed on top. It appears in Late Gothic of the fifteenth and sixteenth centuries.
See also arch.
Compare with other types of arches.
diagonal ribs: The moldings which mark the diagonals in a rib vault.
diaper:
A pattern formed by small, repeated geometrical motifs set
adjacent to one another, used to decorate stone surfaces in architecture
and as a background to illuminations in manuscripts, wall painting or
panel painting.
See also rib vault
Other types of ribs:
lierne,
ridge,
tierceron,
transverse
Compare with motte-and-bailey
dog tooth: An ornamental motif consisting of a square, four-leafed figure, the center of which projects in a point. It was a very populare in Early English (Early Gothic) architecture.
Compare with other repetative decorative motifs.
dome: A hemispherical vault.
See also
semi-dome, squinch,
pendentive
drum: A cylindrical wall which supports a dome.
drum pier: Massive circular support.
See also: pier, alternation of support
Other types of piers: composite