Ardglass Castle, Medieval fortress in Ardglass, Northern Ireland.
Ardglass Castle is a fortified structure that stretches along the shoreline with three square towers and thick defensive walls throughout its design. The original 15th-century complex started as merchant warehouses before being converted into a residential fortress with a more formal appearance.
The site originated as merchant warehouses in the 15th century and later underwent major renovation by Charles FitzGerald in the 18th century to become a fortified residence. This transformation marked the shift from purely commercial use to a defensible dwelling.
The castle reflects its role as a trading post by combining commercial storage with defensive features designed to protect maritime interests. The narrow openings facing the sea reveal how seriously the occupants took threats from water-based attacks.
The site now operates as a clubhouse for Ardglass Golf Club while preserving many original interior details and architectural features. Visitors should be aware that certain areas may be restricted during private events or club activities.
Each of the three towers functioned as independent apartments with separate stone staircases yet deliberately lacked fireplaces throughout. This unusual choice reveals how the inhabitants prioritized space efficiency over heating comfort.
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