1. Defense: Parapets were designed to provide protection for castle defenders during battles and sieges. They allowed soldiers to stand behind them and fire arrows or other projectiles at the attackers while minimizing their exposure to enemy fire.
2. Archery Platforms: Parapets often featured openings or "arrow slits" that allowed archers to shoot from covered positions. These arrow slits were typically narrow on the outside to prevent enemy projectiles from entering but widened on the inside to provide the archer with a clear field of view and greater maneuverability.
3. Observation and Surveillance: Parapets elevated soldiers' positions, enabling them to observe the surrounding areas, detect approaching enemies, and provide early warnings of potential attacks.
4. Cover from Projectiles: Parapets were designed to deflect or stop enemy projectiles, such as arrows, rocks, and cannonballs, thereby protecting the defenders within the castle.
5. Blocking Ladders and Scaling Attempts: The height and sturdiness of parapets made it more challenging for attackers to scale the castle walls using ladders or siege towers, providing an additional layer of security.
6. Psychological Impact: The imposing appearance of parapets and their strategic placement along the castle walls could intimidate attackers and deter them from attempting to breach the castle's defenses.