Constantine, also spelled Qacentina or Kasantina, is the capital of Constantine Province in northeastern Algeria. During Roman times it was called Cirta and was renamed "Constantina" in honor of emperor Constantine the Great. It was the capital of the French department of Constantine until 1962. Located somewhat inland, Constantine is about 80 kilometres from the Mediterranean coast, on the banks of the Rhumel River.
Constantine is regarded as the capital of eastern Algeria and the commercial center of its region, and it has a population of about 450,000, making it the third largest city in the country after Algiers and Oran. There are several museums and historical sites located around the city. Constantine is often referred to as the "City of Bridges" due to the numerous picturesque bridges connecting the various hills, valleys, and ravines that the city is built on and around.
Constantine was named the Arab Capital of Culture in 2015.