História do Porto

Proto-Celtic and Celtic people were among the first known inhabitants of the area. Ruins of that period have been discovered in several areas.[citation needed] Archaeological findings reveal that there were also human settlements at the mouth of the Douro River as early as the 8th century BC, which hints at a Phoenician trading settlement there.[21]

During the period of Roman Empire in the Iberian Peninsula, the city developed as an important commercial port, primarily in the trade between Olissipona (the modern Lisbon) and Bracara Augusta (the modern Braga).[21] Porto was also important during the Suebian and Visigothic times, and a center for the expansion of Christianity during that period.[22]