Loop window

Loop window

1.
Loophole Any opening in a parapet or wall to allow for vision, light, or air.
2. A long, narrow, vertical opening, usually widening inward, cut in a medieval wall, parapet, or fortification, for use by archers. See also: French window

loop window

loop windows
A long, narrow, vertical opening, usually widening inward, cut in a medieval wall, parapet, or fortification for use by archers; an arrowloop. (See illustration p. 602.)
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Wander round the ramparts and narrow footways along high walls, enjoy the view from look-out turrets, ponder the ominous gloom of the prison dungeons, negotiate circuitous stone steps, upwards and downwards, to discover yet another cellar, panoramic view-point or arrow loop window through which 13th century soldiers once shot arrows at attackers.