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an arched structure of stone, brick, or reinforced concrete, forming a supporting structure of a ceiling or roof.
arch placed at the junction of a masonry arch with the supporting wall.
Wheel window, rose window
a round window with a central point from which a form of spoke may radiate.a round window with a central point from which a form of spoke may radiate.
troughs dug at the base of the walls of a fortified building to make it easier to defend. Often dry, the moat is sometimes filled with water if local conditions allow it.
bench built into the window flanning. Very often made of stone integrated into the masonry