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. It is popularly known as Great Wall of South 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 site is so fortified that Chhatrapati Shivaji Maharaj, the Maratha king, ranked it as the "most impregnable fortress in India", and it was called the "Troy of the East" by the British.
It was originally built by Ananta Kon around 1190 AD.
The fort at Gingee was declared a National Monument in 1921 and was under the Archaeological Department.
It has been recognized as a UNESCO World Heritage Site, making it the fourth such site in Tamil Nadu.