Tiruchirappalli Rock Fort
Tiruchirappalli Rockfort is a historic fortification and temple complex built on an ancient rock. It is located in the city of Tiruchirappalli, Tamil Nadu, India. It is constructed on a  high rock that may date to over one billion years ago.  There are two Hindu temples inside, the Ucchi Pillayar Temple, Rockfort and the Thayumanaswami Temple, Rockfort. Other local tourist attractions include the famous Pallava-era Ganesha temple and the Madurai Nayak-era fort. The fort complex has witnessed fierce battles between the Madurai Nayakas and Adil Shahi dynasty of Bijapur, Carnatic region and Maratha Imperial forces. The fort played an important part during the Carnatic Wars, helping lay the foundations of the British Empire in India. The Rockfort is the most prominent landmark of the city.