Seven_Cities_of_Delhi

History of Delhi begins with Mahabharata. There was a village named Indrapat near the old fort. Indraprastha is believed to have been the Pandavas' capital. On the foundation of Indraprastha, the Mughal ruler Humayun built the old fort. There is also some evidence related to Indraprastha in the blue umbrella and corporabod area. But if we talk about historical documents, the first mention about Delhi is found in 737 AD
http://indiatraveltours.com/blog/golden-triangle-tours/start-delhi-agra-jaipur-tour/