King John's Castle is Limerick's most iconic landmark, located in the Englishtown district on the banks of the River Shannon, representing over 800 years of Irish history. A Viking settlement originally occupied this strategic location before King John ordered construction of the stone fortress in 1200 that dominates Limerick's skyline today. The castle has witnessed sieges, rebellion, and centuries of change throughout various periods of conflict and renewal. Visitors can explore towers and chambers using contemporary storytelling techniques for an immersive historical journey. The on-site Siege Café offers refreshments with panoramic views of the castle grounds and river. The castle operates daily with winter hours 9:30am–5pm and summer hours 9:30am–6pm, providing educational tours for school groups and hosting regular cultural events and family activities.