👉 In the context of architecture, "appurtenance" refers to the relationship between a structure and its surroundings. It involves the influence or effect that the building has on its environment, including how it affects the surrounding landscape, atmosphere, and public perception. For example, a building might have an appurtenance such as a fountain in front of a park, which adds a visual interest to the area and enhances the overall aesthetic appeal of the park. Alternatively, a building may have an app