A louver round is an architectural feature commonly used in windows, doors, and vents to control the flow of air and light while adding a decorative element to the building. It consists of a series of horizontal slats or blades arranged in a circular shape, which can be adjusted to control the amount of air and light that enters a building or room. The circular shape of the louver adds a distinctive and elegant touch to any building facade and is often used in traditional or classic architectural styles. Louver rounds can also be used to create a decorative effect, such as in gables or dormers.