Siri Fort was built by Allauddin Khilji to defend the city of Delhi from the Mongol attack.
Siri Fort is one of the many forts of Delhi, which were built during the time of the Delhi Sultanate (AD 1191-1526) in the medieval age.
It is situated between Hauz Khas and Mehrauli.
The fort was said to be a part of the city of Siri.
The city was built in order to protect the Delhi Sultanate from the Mongols' attack.
According to some legends, the city derives its name from the Hindi word ‘sir’ meaning head because about 8000 heads of Mongol soldiers were buried in the walls of the city.
Allauddin Khilji built the fort city at Siri, which served as the administrative center of the Khilji kingdom and was the first city in Delhi to be built by the Muslim rulers of India.