Annaba is a city in the north-eastern corner of Algeria near the river Wadi Seybouse and Tunisian border. Its old name was "Bone".

Annaba, which was called Hippo Regius during Roman times, was probably established by the Phoenicians in the 12th century BC. It was a centre of early Christianity. Augustine of Hippo was bishop here from 396 until 430. The city has Christian, Muslim, and Roman buildings.

Today (2003), Annaba has about half a million inhabitants. The economy is diversified. It is Algeria's main port for mineral exports.