English: Qila Rai Pitora is one of the seven cities which make today's Delhi. It was also known as Rai Pithora and was founded by Prithviraj Chauhan, the popular hero of the stories of Hindu resistance against Muslim invaders. Prithviraj's ancestors captured Delhi from the Tomar Rajputs who have been credited with founding Delhi. Anangpal, a Tomar ruler possibly created the first known regular defense -work in Delhi called Lal Kot - which Prithviraj took over and extended for his city, Qila Rai Pithora. The ruins of the fort ramparts are still partly visible in the area around Qutab Minar.