Castles and Town Walls of King Edward in Gwynedd

This World Heritage property comprises a group of castles and fortified town walls in Gwynedd, northwest Wales, constructed in the late 13th and early 14th centuries under King Edward I as part of his colonisation and military program in Wales.

The castles are notable for their large scale and sophisticated military design, including concentric defenses, massive curtain walls and integrated town fortifications. Beaumaris is often cited for its planned concentric layout, Conwy and Caernarfon feature extensive town walls and imposing gatehouses, and Harlech sits on a dramatic coastal spur.

Following the military campaigns of the 1280s and 1290s, Edward I ordered the construction of new castles and fortified towns to control the region; work took place from the 1280s into the early 14th century under royal architects and master masons. The sites functioned as military strongholds, administrative centres and symbols of royal authority.

All sites are in coastal and near-coastal Gwynedd in northwest Wales, distributed along a stretch of the Irish Sea coast and inland locations within the historical county; they are accessible from regional centres such as Bangor and Caernarfon.

• Principal components: Major sites in the property include Conwy, Caernarfon, Beaumaris and Harlech, all designed in the late 13th century as part of Edward I's campaign to secure control over North Wales.

What to See #

• Town walls: A concentric defensive complex and town walls constructed to garrison and control the North Wales coast, incorporating massive curtain walls, towers and gatehouses.
• Edwardian castles: Conspicuous coastal castles displaying state-of-the-art 13th-century military architecture built to assert English rule in Wales and control maritime approaches.