Casbah of Algiers
The Casbah of Algiers is founded on the ruins of old Icosium in the 10th century. It was a city built on a hill, stretching towards the sea, divided into the "High city" and the "Low city". One finds there masonry and mosques dating from the 17th century: Ketchaoua Mosque (built in 1794 by the Dey Baba Hassan) flanked by two minarets; Djama’a al-Djedid (1660, at the time of the Ottomans) with its large finished ovoid cupola points some and its four cupolas; Djamaâ el Kebir (the oldest of the mosques), built by Almoravid ruler Yusuf ibn Tashfin; and Ali Bitchin Mosque (Raïs, 1623). The Casbah also contained several palaces, including Dar Aziza, Dar Mustapha Pacha, Palace of the Dey, and Dar Hassan Pacha which was built in 1791 to house the Pasha, who lived there for eight years.