Known asDinpanah meaning the ‘refuge of the faithful', the Purana Quila was built between 1538 and 1545 by the Mughal emperor Humanyun. The fort originally lay on the bank of the river Yamuna before the river changed its course. The Purana Quila was built by Humayun in an attempt to build a city of his own. But characteristically, the Old Fort did not bear the name of its creator unlike the other emperors erecting such structure. When Sher Shah defeated Humayun most of the structures inside the old fort were demolished and was renamed as. But once again as Humayun recaptured his city from Sher Shah's son he took the task of completing the city and rebuilding its old glory.