What does the term "fenestration" refer to in building design?

Fenestration refers specifically to the arrangement, proportion, and design of windows, doors, and similar openings in a building's facade. It plays a crucial role in the overall aesthetics, functionality, and energy efficiency of a building. The strategic placement and size of windows and doors can significantly impact natural lighting, ventilation, and thermal performance, making fenestration a key consideration in architectural design and construction. By emphasizing the importance of how these elements interact with the rest of the building, fenestration contributes to the visual appeal as well as the practicality of the space.