Constructed on the site of the old Saifabad Fort, which was built as the residence of Nawab Saif ud-Din Mahmud or Saif Khan, the fort was renovated by Maharaja Karam Singh of the princely state of Patiala in 1837.

[1][2][3] The fort is built in an area of about 21 sq kilometers in a circular shape surrounded by two ramparts and moat.

The fort was built in 1658 and later renovated between 1837 and 1845 in the cost of around ₹ 100,000 at that time.

[1] The fort was named after Guru Tegh Bahadur, the ninth Guru of Sikhism, by Maharaja Karam Singh in 1837.

[1][4] Media related to Bahadurgarh Fort at Wikimedia Commons