🪖 King John's Castle (Limerick)

King John's Castle also known as Limerick Castle is a 13th-century castle located on King's Island in Limerick, Ireland, next to the River Shannon. Although the site dates back to 922 when the Vikings lived on the Island, the castle itself was built on the orders of King John of England in 1200. Some of the external walls, towers and fortifications remain, and the site is open for visitors. The remains of a Viking settlement were uncovered during archaeological excavations at the site in 1900.