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Lancet windows at Hexham Abbey
Wikimedia Commons

A lancet window is tall and narrow, topped by a pointed arch, and is typically associated with the English Gothic architectural style of the late 12th to the mid-13th century,[1] introduced from France.[2] The name derives from the window’s resemblance to the lance carried by a knight.[3]

The term lancet window is properly applied to windows without tracery,[4] an architectural device that divides windows into smaller sections by the insertion of stonework to support the glass.[5]