arch * illustrations
bartizan, n. overhanging battlemented corner turret at the top of a castle or church tower. The Oxford Illustrated Dictionary has this word as being coined by Sir Walter Scott, from a misunderstanding of an illiterate Scottish spelling of bratticing parapet.
battlement, n. Indented parapet on top of a wall, particularly of a castle, providing protection to defenders and (at the indents or crenels or embrasures) positions for them to fire on assailants; battlemented adj.
castellated adj. Built like a castle, with battlements; looking like a castle. castellation n.
crenellate v. to add battlements or loopholes. crenellation n.
machicolation n. Opening between supporting corbels for dropping stones etc onto assailants. machicolated adj.
masonry. def. illustrate
moulding ditto illustrate
string-course n. Raised horizintal band running around
or along the outside of a building, in classical architecture often
with a moulded profile.