Dungarvan Castle | Heritage IrelandThis castle dates from the early days of the Anglo-Norman settlement in Ireland. It was built c.1209 to safeguard the entrance to Dungarvan Harbour. TheThis castle dates from the early days of the Anglo-Norman settlement in Ireland. It was built c.1209 to safeguard the entrance to Dungarvan Harbour. The polygonal shell keep – a rare building type in Ireland – is the earliest structure on the site. The https://heritageireland.ie/visit/places-to-visit/dungarvan-castle/