Caernarfon Town Walls: Medieval Guardians of a Royal Borough

Origins of a Fortress Town

The Caernarfon Town Walls were built between 1283 and 1292 following Edward I’s conquest of North Wales. Designed alongside the imposing Caernarfon Castle, the walls formed a defensive circuit around the new English settlement, intended both to protect and to assert royal authority. The construction mobilized large numbers of laborers from England, costing around £3,500—a significant sum at the time. The walls enclosed approximately 4.18 hectares, following a hexagonal plan adapted to the pre-existing Norman castle site, which uniquely remained outside the walls as a marketplace.

Architectural Features and Defensive Design

The walls extend 734 meters, punctuated by eight towers and two medieval gatehouses—the East Gate and the West (Water) Gate. Built mainly from carboniferous limestone, the towers are predominantly "gap-backed," lacking inner walls to allow for removable wooden bridges that could isolate sections during attack. The north-west corner houses the 14th-century Saint Mary’s Chapel, integrated into the defenses with a fully circular tower serving as a vestry. Over centuries, some towers have been repurposed, including one converted into a holiday home and others serving civic or club functions.

Historical Significance and Military Role

The walls were a vital part of Edward I’s strategy to secure English control over North Wales and to encourage English settlers from Cheshire and Lancashire to inhabit the town safely. The fortifications proved their worth during the 1294 rebellion led by Madog ap Llywelyn, when the walls sustained damage but held firm after costly repairs. Later, during Owain Glyndŵr’s uprising in the early 15th century, the walls again defended the town successfully against Welsh attacks. The Tudor dynasty’s rise in the 16th century eased hostilities, reducing the walls’ military importance and allowing Welsh residents to live within the town.

Preservation and Modern Legacy

Today, Caernarfon’s Town Walls are among the best-preserved medieval town defenses in Britain. They form part of the UNESCO World Heritage Site known as the Castles and Town Walls of King Edward in Gwynedd, recognized for their architectural coherence and historical authenticity. Conservation efforts have focused on maintaining the walls with minimal intervention, preserving their original form, materials, and features. Visitors can admire the walls’ commanding presence, which continues to shape Caernarfon’s historic townscape.

Visitor Experience and Surroundings

The walls offer a scenic walking route around Caernarfon’s old town, providing panoramic views of the castle, Menai Strait, and the surrounding countryside. The terrain is generally level and accessible, with some sections offering shaded streets that evoke the medieval atmosphere. Nearby, the town bustles with Welsh cultural pride, visible in local art, crafts, and language, enriching the heritage experience. The walls stand not only as a military relic but as a symbol of Caernarfon’s identity and resilience through centuries of change.

Symbolism and Cultural Impact

Beyond their defensive role, the walls were a powerful symbol of English colonial ambition and governance in medieval Wales. Their imposing presence was designed to impress and intimidate, reinforcing Caernarfon’s status as the capital of the principality of North Wales. The walls’ survival through rebellions and political shifts reflects the complex history of Welsh-English relations and the evolving identity of the town. Today, they invite reflection on the layers of history embedded in Caernarfon’s streets and stones.