* '''The Casbah''' (of '' Al Qasbah'', "the Citadel"), Ier District of Algiers: called '' Al-Djazaïr Al Mahroussa '' (“Well Kept Algiers”), it is founded on the ruins of old Icosium. It is a small city which, built on a hill, goes down towards the sea, divided in two: the High city and the Low city. One finds there masonries and mosques of the 17th century; Ketchaoua mosque (built in 1794 by the Dey Baba Hassan) flanked by two minarets, mosque el Djedid (built in 1660, at the time of Turkish regency) with its large finished ovoid cupola points some and its four coupolettes, mosque El Kébir (oldest of the mosques, it was built by Almoravid Youssef Ibn Tachfin and rebuilt later in 1794), mosque Ali Betchnin (Raïs, 1623), Dar Aziza, palate of Jénina. In the Kasbah, there are also labyrinths of lanes and houses that are very picturesque, and if one gets lost there, it is enough to go down again towards the sea to reposition oneself.