The Irish Penny Journal, Vol. 1 No. 10, September 5, 1840

Set against the sweeping bend of the Shannon where it widens into Lough Ree, the peninsula of Rinn‑Duin juts out like a natural stronghold. Its eastern shore offers uninterrupted views of glittering islands and distant banks, while the western side cradles a sheltered bay framed by gentle, green slopes. The landscape’s dramatic isolation made it an obvious choice for early peoples to reinforce with fortifications, a fact still echoed in the ancient Celtic name meaning “point of the fort.”

The article traces the site’s layered past, beginning with its likely use as an earthen refuge before the 9th‑century Danish king Turgesius turned it into a naval base. By the late 12th century, Anglo‑Norman forces sought shelter there after a crushing defeat, only to later seize the peninsula amid Connacht’s internecine wars. Their engineers reshaped the headland, erecting a stone castle whose ruins and surrounding ditch still mark the footprint of that turbulent era.