Science Fair Project Encyclopedia
The shields of male armigers are commonly displayed on a shape known as an escutcheon, based on the shape of Medieval shields used by knights in combat. Since this shape has been regarded as a war-like device appropriate to men only, ladies customarily bear their arms upon a lozenge, or diamond-shape, and clergymen bear theirs on a cartouche, or oval.
An escutcheon is also an item of door furniture.
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