Bala Hissar is an ancient fortress located in the city of Kabul, Afghanistan. The estimated date of construction is around the 5th century AD. Bala Hissar sits to the south of the modern city centre at the tail end of the Kuh-e-Sherdarwaza Mountain. The Walls of Kabul, which are 20 feet (6.1 m) high and 12 feet (3.7 m) thick, start at the fortress and follow the mountain ridge in a sweeping curve down to the river. It sports a set of gates for access to the fortress. The Kōh-e Shēr Darwāzah (lion door) mountain is behind the fort.
Bala Hissar was originally divided into two parts: The lower fortress, containing the stables, barracks and three royal palaces, and the upper fortress (the actual fort with the name Bala Hissar) housing the armory and the dungeon of Kabul, known as the "Black Pit" (the Siyah Chal).
The Second Battle of Panipat was fought on 5 November 1556 between the forces of Akbar and Hemu, a Hindu King of Delhi. Hemu had a large army, and initially his forces were winning, but suddenly Hemu was struck by an arrow in the eye and he lost his senses. The wounded Hemu was captured by Mohammed Quli Khan and carried to the Mughal camp at Shodapur on Jind Road at Panipat. According to Badayuni, Bairam Khan asked Akbar to behead Hemu so that he could earn the title of Ghazi. Akbar replied 'He is already dead, if he had any strength for a duel, I would have killed him'. After Akbar's refusal Hemu's body was denied honour by the Mughal battle tradition and was unceremoniously beheaded by Bairam Khan. Hemu's head was sent to Kabul where it was hung outside the Delhi Darwaza of Bala Hissar, Kabul while his body was placed in a gibbet outside Purana Quila in Delhi to terrorise Indians.
As Kabul's principal fortress, Bala Hissar was an important site both in the First (1838–1842) and Second Anglo-Afghan War (1878–1880).