The Tiruchirapalli Rock Fort is a historic fort and temple complex built on an ancient rock. It is located in the city of Tiruchirapalli, which is in the Indian state of Tamil Nadu. It is constructed on a 273-foot high rock. There are two Hindu temples inside the Rockfort, the Uchchi Pillaiyar Koil and the Siva Temple. Geologically the 83 m high rock may date to over one billion years ago. Other local tourist attractions include the famous Pallava-era Ganesa temple and the Nayaka-era fort. The fort complex has witnessed fierce battles between Madurai Nayakas and Bijapur, Carnatic and Maratha forces. The fort played an important part during the Carnatic wars, helping lay the foundations of the British Empire in India.