A spandrel is the roughly triangular space above and on either side of an arch.[1] The wall above the arch, forming the spandrel, is known as the spandrel wall.[2]

In a building with more than one floor, the term spandrel is also used to describe the space between the top of the window in one storey and the sill of the window in the storey above.[3]

## Bibliography

Ching, F. D. K. (2014). Building Construction Illustrated. John Wiley & Sons.
Curl, J. S. (2006). spandrel. In A Dictionary of Architecture and Landscape Architecture (2nd ed.). Oxford University Press. Retrieved from https://www.oxfordreference.com/view/10.1093/acref/9780198606789.001.0001/acref-9780198606789-e-4373
Curl, J. S. (2006). spandrel-wall. In A Dictionary of Architecture and Landscape Architecture (2nd ed.). Oxford University Press. Retrieved from https://www.oxfordreference.com/view/10.1093/acref/9780198606789.001.0001/acref-9780198606789-e-4378