Hisar city, previously spelled Hissar, is the administrative headquarters of Hisar district, in the state of Haryana, in northwestern India. Hisar was founded as Hissar-e-Firoza by Firoz Shah Tughlaq, on the demolished ruins of an existing prosperous Hindu and Jain city of Iksaru. The word Hisar derives from a Turkish word meaning "Fortress".Hisar is located at 29°9’11” north latitude and 75°43’6” east longitude. It is situated northwest of Delhi on the National Highway NH 10.

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