The allure is the wall-walk found at the top of a curtain wall and is normally found on the inside of the wall. This allowed guards to look over the top of the wall to look for enemies. The wall-walk is reached either from a set of stairs running up the inside of the wall, or from a tower built into the wall. Allures also occur on the outside of the walls. In this case a wooden section was built overhanging the wall called a hoarding. Holes in the floor of the hoarding allowed the defenders to drop missiles on the attackers below.