Indicative to Ireland, Bawns were defensive walls which were built to protect a central Tower. The Towers were designed to allow persons to protect cattle (by having fighting positions). Beef was an important and expensive commodity. The Tower systems were built as the traditional defensive Towers and walls were in that period (only smaller). Bawns and their attached mini-Keeps and Towers strongly resembled "small castles". Bawns were popular from the 11th to 16th Centuries.