The Casbah (Arabic: , qasba, meaning citadel (fortress)) is specifically the citadel of Algiers in Algeria and the traditional quarter clustered around it. More generally, a kasbah is the walled citadel of many North African cities and towns. The name made its way into English from French in the late 19th century (the Oxford English Dictionary states 1895), and continues to be spelled as acquired from that language. The Casbah of Algiers 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 of two minarets, mosque el Djedid (1660, at the time of Turkish regency) with its large finished ovoid cupola points some and its four coupolettes, mosque El K