A parapet is a low protective wall or barrier that is often found at the edge of a roof, balcony, or terrace. Its primary purpose is to prevent people from falling off the edge and to provide safety for those using the space. Parapets can also help shield the building from wind and rain, contributing to its overall structural integrity. In addition to their safety function, parapets can enhance the aesthetic appeal of a building. They come in various designs and materials, allowing architects to incorporate them into the overall style of the structure. Parapets are commonly seen in historical buildings, such as castles and fortifications, where they served both defensive and decorative purposes.