The importance of towers
During the Middle Ages, few structures inspired as much security as castle towers, which loomed high over the landscape. For those living behind their walls, they represented protection, surveillance, and the ability to withstand a siege even after the rest of the fortress had fallen, as they provided views of the roads, served as coordination points for defense, and offered a refuge for the inhabitants during the most critical moments.
From the imposing keep to the watchtowers located on the curtain walls, each served a distinct function and, over time, many became shrouded in tales blending history, tragedy, and mystery.
The keep: the heart of the castle
The keep was the most important structure in the entire fortress. It was typically built in the most protected area of the compound and stood out for its height and greater durability compared to other buildings.
The lord of the castle resided there, and it was used to store documents, weapons, provisions, and, often, the treasure. It also served as the command center from which the defense was organized during an attack.
If all the walls were breached, the keep became the final refuge, as its thick walls, elevated access points, and limited entrances allowed it to hold out even when the enemy had already penetrated the castle.
Watchtowers: the eyes of the fortress
Distributed at strategic points along the curtain walls, watchtowers allowed for the observation of roads, bridges, rivers, and any path by which an enemy army might approach.
From these towers, sentries could detect movements from a great distance and sound the alarm using smoke signals, torches, bells, or horns. Thanks to this permanent vigilance, the castle could prepare before an attack began.
Their elevated position also made it easier to watch over the feudal lord's lands and protect those working in the surrounding areas.
Flanking towers: protecting the sides of the wall
Unlike other towers, flanking towers projected outward from the curtain wall. Their design allowed defenders to fire along the sides of the wall, reducing so-called blind spots.
If an enemy managed to approach the base of the wall, defenders could attack them from different angles without needing to leave their protected position.
This architectural solution transformed curtain walls into a much more effective system than a simple straight wall.
Gate towers: defending the main entrance
Many main gates were protected by large towers situated on both sides of the entrance.
From these towers, the drawbridge, portcullis, and the mechanisms used to close the castle were controlled. Furthermore, they helped defend the entrance by raining down arrows, bolts, or projectiles from elevated positions.
Round towers and square towers
Early castles had many of their towers built with a square floor plan, a relatively simple shape to construct.
Over time, circular towers began to be built, as they offered significant defensive advantages: by having no corners, they resisted attacks better and distributed the impact of siege engines more effectively; additionally, they allowed for a wider field of vision and improved firing angles around the fortress. This shape also made it easier to utilize the benefits of spiral staircases and their strategic construction.
