King John's Castle

Limerick, Ireland, Ireland

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King John’s Castle is one of Ireland’s most famous medieval fortresses, standing on King’s Island in the heart of Limerick beside the River Shannon. Built around 1200 to 1210 on the orders of King John of England, the castle was constructed on the site of an earlier Viking settlement and was designed to secure Norman control of the region. Throughout its long history, the castle played a central role in many major conflicts, including the Irish Confederate Wars and the Williamite Wars. Its strategic location made it a key military stronghold, and it endured several sieges over the centuries. Today, King John’s Castle is one of Limerick’s most iconic landmarks. With its impressive stone walls, towers, and modern interactive exhibitions, it offers visitors a fascinating insight into more than 1,000 years of history, from Viking beginnings to medieval and later Irish history.