Round Towers are tall, cylindrical stone structures found primarily in Ireland. They were built during the early medieval period, around the 9th to 12th centuries, and served various purposes, including as bell towers for monasteries and places of refuge during attacks. Typically ranging from 20 to 40 feet in height, these towers have a distinctive design with a conical roof and a single entrance, often elevated above the ground. The most famous examples can be seen at sites like Glendalough and Kilmacduagh, showcasing the architectural skill of the time and their significance in Irish history.