Constantine, also called the city of suspension bridges, is located between latitude 36 ° 17 and longitude 6 ° 37 ‘in the very center of eastern Algeria, and occupies a privileged natural site in the center of eastern Algeria; precisely 245 km from the Algerian-Tunisian borders, 431 km from the capital Algiers to the west, 89 km from Skikda to the north and 235 km from Biskra to the south. It covers an area of 2278.20km², or 0.09% of the total area of the national territory.