Portus

Portus - Credit: Wikimedia Commons

Portus was a large artificial harbour of Ancient Rome. Sited on the north bank of the north mouth of the Tiber, on the Tyrrhenian coast, it was established by Claudius and enlarged by Trajan to supplement the nearby port of Ostia. Read more on Wikipedia

type: ancient site
date from: Roman RepublicRoman Empire

Source: en.wikipedia.org