Greencastle Royal Castle

Greencastle Royal Castle, known in Irish as Caisleán na hOireanaí (Castle of the Islands), stands on the eastern shore of Carlingford Lough guarding the strategic waterway between Ulster and Leinster. Built by the Anglo-Norman knight Hugh de Lacy during the 1230s, the stone castle was constructed alongside Carlingford Castle across the lough to control the narrow maritime passage. The monument ...