A transom is a horizontal structural element found in buildings, typically located above a door or window. It serves both functional and decorative purposes, allowing light and air to flow between spaces while also providing support for the structure above. Transoms can be made of various materials, including wood, glass, or metal. In addition to their architectural role, transoms are often used in nautical contexts, referring to the flat surface at the stern of a boat or ship. This area can be important for stability and design, influencing the overall performance and aesthetics of the vessel.