The term 'Ancient Highway' refers to a network of roads that were built in the ancient world. The most famous of these is the ITER, which was an important trade route in the Roman Empire. It connected Rome to the eastern provinces of the empire. The VIA was another ancient highway, which was a major road in the Roman Republic. Finally, the ALCAN was an ancient highway that connected the Mediterranean Sea to the Black Sea. All three of these ancient highways played an important role in the development of the ancient world.