Portus Julius, Baiae
About
Agrippa carved this hidden naval base out of Lake Lucrinus and Lake Avernus in 37 BCE, cutting canals to the sea so Octavian could train a fleet against Sextus Pompey unseen. The ruse worked: that fleet broke cover to win the Battle of Naulochus in 36 BCE. Within decades silt had choked its channels and the fleet relocated to Misenum. By 117 CE its moles and quays stood as a landlocked relic, their outlines still traceable in the shallow water that has since claimed most of the site.
What happened here
Sailing season runs roughly from spring to autumn and the port lives by it. Ships anchor in the outer basin and warp in, or are unloaded by lighters if they draw too much. Cargo comes ashore under the eye of a customs officer taking a percentage, is weighed, and goes into warehouses along the quay. Grain for Rome is the priority and everything else waits behind it. Amphorae are stacked, checked, and the broken ones dumped. Gangs of porters work by the load; shipping agents and guild offices cluster round the harbour square, advertising routes in mosaic on the floor. Divers work the bottom for dropped cargo. In winter the ships are hauled out and the whole place goes quiet.
Sources
Nearby
Roman Maps shows the empire frozen at 11 August 117 CE, the day Trajan died — its moment of greatest territorial extent. Explore the full map →