The part of the protection of the castle were the outside walls. The outside walls were used to protect the castle and also held the soldiers. The walls were 6 to 20 feet thick, up to 45 feet high, and up to 1500 feet long. Another part of the castle used for protection were the wall walks. The wall walks of a castle were used for protection of the castle. The wall walks made it easier for soldiers to move from tower to tower. The soldiers were able to see the approaching enemies from further out because of their high position. The third part of the castle used for protection were the towers. The towers were used for protection of the castle. The towers were round, not square, because the enemies could not topple the towers over. Another part of the protection of the castle were the turrets. A turret is a small tower resting on top of the main tower that was used as a lookout point. The last part of the protection of a castle was the moat. The moat surrounded the castle and made it harder for people or animals to get to the castle. The moat also is filled with