What distinguishes a clerestory in a building?

A clerestory is characterized by its high windows, which are strategically placed to allow ample natural light to illuminate the interior of a building, particularly in large spaces such as cathedrals or public halls. These windows are typically situated above the eye level, promoting not only the entry of light but also contributing to the aesthetic experience of the vertical space. The design of a clerestory serves both functional and artistic purposes, enhancing the atmosphere within.

In contrast, the other choices pertain to different architectural features. A lower set of windows does not fit the definition of a clerestory, as clerestories are elevated. Large decorative murals may adorn a building but do not define a clerestory, and while supportive columns can be essential in various structures, they do not relate to the specificity of clerestory windows. Thus, the defining feature of a clerestory remains its high placement and its role in illuminating a space.