Ostia Antica, Italy.

“Ostia may have been Rome’s first colonia. According to the legend Ancus Marcius, the semi-legendary fourth king of Rome, who was the first to destroy Ficana, an ancient town that was only 17 km (11 mi) from Rome and had a small harbour on the Tiber, and then proceeded with establishing the new colony 10 km (6 mi) further west and closer to the sea coast. An inscription seems to confirm the establishment of the old castrum of Ostia in the 7th century BC.

“The oldest archaeological remains so far discovered date back to only the 4th century BC. The most ancient buildings currently visible are from the 3rd century BC, notably the Castrum (military camp); of a slightly later date is the Capitolium (temple of Jupiter, Juno and Minerva). The opus quadratum of the walls of the original castrum at Ostia provide important evidence for the building techniques that were employed in Roman urbanisation during the period of the Middle Republic.”