History

The Hammadids were a branch of the Zirid Berber dynasty who in 1007 CE broke away from their Zirid overlords and established an independent principality in central Algeria. Founder Hammad ibn Buluggin chose a dramatic mountain ridge in the Hodna range as the site for his new capital — a defensible position with commanding views over the high plateau. He named it Qal’at Bani Hammad, “the fortified city of the sons of Hammad.” Construction was rapid and ambitious: within decades the city had a Grand Mosque, several palace complexes, baths, water cisterns, and the remarkable Dar al-Bahr (House of the Sea), a palace built around an artificial lake measuring 67 by 47 metres, stocked with fish and equipped with boats for royal pleasure.

The Hammadid dynasty reached its cultural apex under Yahya ibn al-‘Aziz (r. 1055–1062) and al-Nasir ibn Alnas (r. 1062–1088), hosting poets, philosophers, and artisans from across the Islamic world. Then in 1052–1054 CE, the Fatimid caliph in Cairo — angered by Zirid abandonment of Shia Islam — unleashed the Banu Hilal tribal confederation westward from Egypt. The subsequent migrations and invasions devastated settled life across the Maghreb over several decades. Al Qal’a was abandoned around 1090 CE and never reoccupied. The stones were quarried for centuries by local populations, leaving only the lower courses of walls and the base of the minaret standing above ground. The 1951 excavations by French archaeologist Marguerite van Berchem revealed the city’s plan for the first time.