The Porto Romano district hugs the inner harbour and marks the footprint of ancient Olbia, which was one of the most significant commercial ports on the western Mediterranean coast during the Roman period. The shallow, sheltered bay made it ideal for trans-shipment between Sardinia's agricultural interior and the wider Roman empire — grain, olive oil, wine, and cork all passed through here.
Walking the streets around the modern waterfront you can see archaeological markers indicating where major finds were made. The neighbourhood has a more local, workaday character than the centro storico further up the hill, and a few trattorias here cater more to dock workers and fishermen than to tourists.