What distinguishes a clerestory from other windows?

A clerestory is defined by its unique placement in architecture; it is located high on the walls of a structure. This positioning is specifically designed to admit natural daylight into the space beneath it, creating a bright and inviting atmosphere. Unlike standard windows that may be positioned at eye level or lower and can serve various functions, the clerestory is primarily focused on enhancing light quality inside while maintaining privacy and structural integrity of the building.

This distinctive feature contributes to its role in architectural design, especially in churches and large public buildings, where ample light and a sense of openness are desired. The other options do not accurately capture the essence of a clerestory's purpose or design. For example, while many clerestory windows do tend to be rectangular, they can also take on other shapes, and the function of allowing light is paramount. Similarly, clerestory windows can sometimes be operable for ventilation, and while they may feature stained glass in certain designs, this is not a defining characteristic of clerestories as a whole.