What is a spandrel in architectural terms?

A spandrel in architectural terms refers to the wall surface between major architectural elements, typically found between the arches or beams that support an upper structure. This area is often triangular in shape, created by the curve of an arch and the horizontal line of the beam or wall above it. Spandrels can serve aesthetic purposes by being embellished with decorative features or motifs, as well as functional roles, such as providing a space for additional structural support or allowing for windows. Understanding the significance of the spandrel helps in recognizing its role in both the design and structural integrity of buildings in various architectural styles.