A City That Controlled a Sea
Any ship crossing the central Mediterranean once squeezed through a narrow corridor between Sicily and the coast of North Africa. There, astride that bottleneck, Carthage planted itself. From this promontory the city did more than watch the sea—it engineered it.
The Twin Cothons
On Carthage’s southeastern flank, the shoreline opens into two great artificial harbors, or cothons. One served commerce, the other war. A walled tower surveyed both, like a lighthouse doubling as a command post. Merchantmen came and went with oil, wine, textiles, and metalwork, while up to 220 warships lay ready for deployment in curved basins that impressed even hostile observers.
The war harbor almost certainly functioned as a vast naval workshop: ships could be constructed, repaired, and outfitted in an environment purpose-built for rapid mobilization. Nearby industrial zones—pottery kilns, metalworking, and textile facilities—fed the maritime engine with amphorae, anchors, weapons, and sails.
Walls Facing the World
Carthage’s walls ran for more than 30 kilometers. Along the shore they were relatively modest; Punic mastery of the sea made an amphibious assault unlikely. But where land offered a path of invasion, on the western isthmus, three massive parallel walls—up to 13 meters high and nearly 10 meters thick—rose in daunting layers that no enemy breached until the city’s final catastrophe.
Industrial Colossus Under Siege
The full scale of Carthage’s maritime-industrial complex became visible during its last great crisis. During the Roman siege of the Third Punic War, the supposedly disarmed city abruptly “organised the manufacture of arms,” producing hundreds of shields, swords, and spears daily, and even building 120 decked ships in two months using timber long held in reserve.
The harbors that had tied Carthage to distant markets now turned inward, becoming the beating heart of a desperate defense. When the walls finally fell, Rome burned the fleet in its own waters—a symbolic killing of the city’s greatest source of power.