information:classification, structural:summarization
Roman Carthage

When Carthage fell, its nearby rival Utica, a Roman ally, was made capital of the region and replaced Carthage as the leading center of Punic trade and leadership. It had the advantageous position of being situated on the outlet of the Medjerda River, Tunisia's only river that flowed all year long. However, grain cultivation in the Tunisian mountains caused large amounts of silt to erode into the river. This silt accumulated in the harbor until it became useless, and Rome was forced to rebuild Carthage.

By 122 BC, Gaius Gracchus founded a short-lived colony, called Colonia Iunonia, after the Latin name for the Punic goddess Tanit, Iuno Caelestis. The purpose was to obtain arable lands for impoverished farmers. The Senate abolished the colony some time later, to undermine Gracchus' power.

After this ill-fated effort, a new city of Carthage was built on the same land by Julius Caesar in the period from 49 to 44 BC, and by the first century, it had grown to be the second-largest city in the western half of the Roman Empire, with a peak population of 500,000. It was the center of the province of Africa, which was a major breadbasket of the Empire. Among its major monuments was an amphitheater.

Carthage also became a center of early Christianity (see Carthage (episcopal see)). In the first of a string of rather poorly reported councils at Carthage a few years later, no fewer than 70 bishops attended. Tertullian later broke with the mainstream that was increasingly represented in the West by the primacy of the Bishop of Rome, but a more serious rift among Christians was the Donatist controversy, against which Augustine of Hippo spent much time and parchment arguing. At the Council of Carthage (397), the biblical canon for the western Church was confirmed. The Christians at Carthage conducted persecutions against the pagans, during which the pagan temples, notably the famous Temple of Juno Caelesti, were destroyed.

The Vandals under Gaiseric invaded Africa in 429. They relinquished the facade of their allied status to Rome and defeated the Roman general Bonifacius to seize Carthage, the once most treasured province of Rome. The 5th-century Roman bishop Victor Vitensis mentions in his Historia Persecutionis Africanae Provincia that the Vandals destroyed parts of Carthage, including various buildings and churches. Once in power, the ecclesiastical authorities were persecuted, the locals were aggressively taxed, and naval raids were routinely launched on Romans in the Mediterranean.

After a failed attempt to recapture the city in the fifth century, the Eastern Roman Empire finally subdued the Vandals in the Vandalic War in 533–534 and made Carthage capital of Byzantine North Africa. Thereafter, the city became the seat of the praetorian prefecture of Africa, which was made into an exarchate during the emperor Maurice's reign, as was Ravenna on the Italian Peninsula. These two exarchates were the western bulwarks of the Byzantine Empire, all that remained of its power in the West. In the early seventh century Heraclius the Elder, the exarch of Carthage, overthrew the Byzantine emperor Phocas, whereupon his son Heraclius succeeded to the imperial throne.