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The Role of the Barbican in Castle and City Defenses

A barbican is a fortified outer gateway or defensive outpost designed to protect the entrance to a castle, town, or city. Strategically positioned to guard against enemy attacks, barbicans were often manned by military garrisons and featured strong defensive elements such as walls, towers, and gates. The term “barbican” originates from the Old French word barbacane, reflecting its roots in medieval European military architecture. Understanding barbicans is essential to appreciating the complex defense systems of medieval fortifications.

A Medieval Castle Being Defended Under Siege

A barbican basically applies to any gateway that is fortified. A barbican could be used to trap enemy soldiers, as they rushed through the entrance towards the castle’s main gate the doors could be closed behind them, trapping them in the space between, archers would then pick them off from the outer walls.

Small castles would commonly have two towers on either side of a barbican, larger castles could have four!

Castle Barbican Lewes - Parts of a Medieval Castle

During medieval times, wars and invasions were common, and thus special attention was paid to the construction of castle parts that were reserved for defence.

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Some of the important castle parts designed specifically for defence purposes included a moat, castle keep, machicolations, arrow loops, and others.

Amongst the defensive parts of a castle, the barbican was of particular significance and served as a fortified outpost.

Castle Barbican - Castle Parts
Medieval Barbican

Castle Barbican Definition

A castle barbican was among those castle parts which served as the first line of defence. It was construed in the form of a tower or a gateway over the gate or bridge of the castle.

Parts of a Castle - Bodiam Barbican
Bodiam Castle Barbican

The connection between a barbican and the castle walls was maintained by a walled road which was called “the neck”. This narrow passage was also called the “death trap” because it trapped the invading enemy and made them an easy target.


Medieval Castle Barbican Location

The most common location of a medieval castle barbican was adjacent to the main gates of the castle. It served as an exterior walled passage that was deliberately kept narrow to trap the invading enemy.

Visit a Castle with a Barbican


Who Was in Charge of the Barbican

Only a small number of men were used to defend the medieval castle barbican because of limited space. The knights and soldiers inside the castle were responsible for the defence of the castle and thus they also overlooked the defence of the barbican.

A single knight could be in charge of a barbican with several soldiers obeying his orders.

Castle Military of Castle Barbican - Castle Parts

Purpose of a Castles Barbican

A castle barbican was among those castle parts which served multiple purposes. The most obvious one was the confinement of the invading enemy in the narrow passage and making them an easy target.

Barbican Murder Holes - Medieval Castle Parts
Barbican Murder Holes

Barbicans often had “murder holes” which were holes in the ceiling and could be used to throw heavy missiles or boiling liquids on the invading enemy.

Chepstow Castle Arrow Slits Arrow Loops

On either side of the narrow medieval castle barbican, there were also arrow-slits used to shoot arrows at the enemy. Due to the multiple defence purposes that a medieval castle barbican served, coupled with its lethal nature, it was also called a “Death Trap”.

How did the Barbican Work

A medieval castle barbican could also work in certain other ways for defence. For instance, it was not unusual to suspend a heavy grilled door from the barbican. This grilled door was called a Portcullis and could be lowered on the enemy when attacked.

Castle Portcullis - Parts of a Castle
Castle Portcullis

It had spikes on it was dropped on the enemy, it would injure multiple people and block the passageway. Thus a medieval castle barbican worked in several ways and could serve multiple useful defence purposes for the medieval castle.

Castle Barbican Summary

A castle barbican had central importance in the parts of a medieval castle which were used for defence purposes. Since it consisted of a narrow passage, the invading army passing through it was an easy target for arrows, stones, and other missiles in addition to boiling liquids.

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Further, a medieval castle barbican could also be used to suddenly lower the lethal grilled door called “Portcullis” to injure the enemy soldiers. Due to its multiple and effective defence purposes, a medieval castle barbican was also called a Death Trap.