Limerick Castle, also known as King John's Castle, is a historic fortress located in Limerick, Ireland. Built in the early 13th century, it was constructed by the Normans to control the River Shannon and protect the city. The castle features impressive stone walls and towers, showcasing medieval military architecture. Today, Limerick Castle is a popular tourist attraction, offering visitors a glimpse into Ireland's rich history. The site includes a visitor center with exhibitions about the castle's past and the surrounding area. Its strategic location and well-preserved structure make it an important landmark in Limerick.