Anangpal Tomar, or Anangpal I, or Bilan Dev Tomar (731–36 A.D.) was a Chandravanshi Puruvanshi Kshatriya, descendant of Samrat Parikshit. He was the first ruler to make ancient Indraprastha (modern-day Delhi) his capital. Anangpal (one who rules all, Samraat) I, a chief of Tomara/Tanwar founded Lal Kot in 736 AD. The Prithviraj Raso names the Tomar Anangpal as the founder of Lal Kot, whose name is inscribed on Iron Pillar of Delhi at Qutb complex, ascribed to Chandra or Chandragupta II.
Tomars of Delhi, Chauhans of Ajmer, Chandelas of Jejakbhakti, Solankis of Gujarat and Gaharwars of Kannauj (Rathores) were the most prominent kings of north India between 7th and 11th century who kept fighting for or against each other in those times for supremacy. The Chauhan kings of Ajmer conquered Lal Kot in 1180 and renamed it Qila Rai Pithora.