WINDOW RESEARCH INSTITUTE

Bay window

A window that projects outward from the exterior wall, typically with three glass panels. It originated in Renaissance Europe, and was commonly used in grand residences, such as halls, libraries, and galleries. The term bay originally referred to a structural division within a building and later evolved into an architectural feature that enhances both aesthetics and interior openness. When curved or segmented, it is called a bow window, whereas an angled or rectangular form is called a canted bay window or rectangular bay window. If located on an upper floor and supported by brackets or corbels, it is called an oriel window.

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