D

Dendrochronology

method of dating wood through the study of the annual rings.

Detached column

cylindrical column situated against a pillar or wall.

Diaphragm arch

internal gable wall mounted on a transversal arch placed between two bays.

Distemper

A water-soluble paint using egg-yolk or glue size as a binder.

Dome

a convex roof.Domes are categorized according of the shape of both the base and the section through the center of the dome.

Donjon

the principal tower of a castle, usually in the centre.

Doorway

monumental door integrated into a facade, giving access to a building

Double ring arch

arch with a double row of quoins.

Drawbridge

mobile bridge over a moat, the deck of which lifts up to prevent access to the castle

Dripstone

projection from the cornice designed to prevent water running down the walls.

Drum

cylindrical-shaped stone.