spandrel

thumb|Spandrels of a Tudor arch thumb|Spandrels of a circle within a square thumb|Spandrel figures of winged victories, [[Arc de Triomphe du Carrousel, Paris]] thumb|Spandrel panels

A spandrel is a roughly triangular space, usually found in pairs, between the top of an arch and a rectangular frame, between the tops of two adjacent arches, or one of the four spaces between a circle within a square. They are frequently filled with decorative elements.