Gingee Fort 

Gingee Fort or Senji Fort (also known as Chenji, Chanchi, Jinji or Senchi) in Tamil Nadu, India is one of the surviving forts in Tamil Nadu, India. It lies in Villupuram District, 160 kilometres (99 mi) from the state capital, Chennai, and is close to the Union Territory of Puducherry. The fort is so fortified, that Chhatrapati Shivaji, the Maratha king, ranked it as the "most impregnable fortress in India" and it was called the "Troy of the East" by the British.

Originally built by Ananta kon of the konar Dynasty around 1190 AD and later fortified by Krishna Konar, it was later modified in the 13th century to elevate it to the status of an unbreachable citadel to protect the small town of saenji. It was also the headquarters  domination in northern Tamil Nadu. The fort was built as a strategic place of fending off any invading armies. As per one account, the fort was further fortified during the 15–16th century, the lieutenants of the and who later became independent kings. The fort passed to the Marathas under the leadership of Shivaji in 1677 AD, Bijapur sultans, the Moghuls, Carnatic Nawabs, French and the British in 1761. The fort is closely associated with Raja Tej Singh, who unsuccessfully revolted against the Nawab of Arcot and eventually lost his life in a battle.