The Spandrel ClipArt gallery includes 4 examples of the space between two arches or between an arch and a rectangular enclosure.

"De Bohun badge. From the central spandrel of the Canopy of the Brass to Alianore de Bohun, Duchess of Gloucester, A.D. 1399, in Westminster Abbey."—Aveling, 1891

De Bohun Badge

"De Bohun badge. From the central spandrel of the Canopy of the Brass to Alianore de Bohun, Duchess…

"...the triangular space comprehended between the outer curve or extrados of an arch, a horizontal line drawn through its apex, and a vertical line through its springing; also, the wall-space between the outer moldings of two arches and a horizontal line or string-course above them, or between these outer moldings and the intrados of another arch rising above and inclosing the two. In medieval architecture the spandrels are often ornamented with tracery, sculptured foliage, and the like." —Whitney, 1889
<p>Illustration of a spandrel from the cloisters at Mont Saint-Michel in France.

Sculptured Spandrel from Mont Saint-Michel

"...the triangular space comprehended between the outer curve or extrados of an arch, a horizontal line…

Spandrel from church at Stone, Kent.

Spandrel

Spandrel from church at Stone, Kent.

Carved spandrel from Hagia Sophia.

Spandrel from Hagia Sophia

Carved spandrel from Hagia Sophia.