Mangonel

Mangonel: stone:throwing machine worked by torsion, used as a siege weapon against castles
Merlon: part of a battlement, the square "sawtooth" between crenels ...

Mangonel - stone throwing catapult used as a siege engine.
Mantlet - detached fortification preventing direct access to a gateway; low outer wall.
Merlon - the high segment of the alternating high and low segments of a battlement.

Mangonel: A form of catapult Mantlet: Detached fortification preventing direct access to a gateway; low outer wall. Mask head: An animal head employed in conjunction with interlace or foliage motifs. Mausoleum: Structure for a tomb.

See also: Bay window, Solar, Wall-walk, Allure, Arrow loop