The Roman public latrine is one of the few structures from antiquity that still makes modern visitors physically uncomfortable. A long stone bench, twenty or more keyhole-shaped openings cut into it at close intervals, no partitions, no doors, and a shallow water channel running along the floor at the feet of everyone seated. It looks less like a bathroom than like a piece of civic furniture — which is precisely what it was.

In the National Maritime Museum in Haifa, a marble sarcophagus panel from sixteenth-century Italy shows the ancient port of Rome in relief: harbor buildings rising from the waterline, ships under sail and oar working the channel, a colossal Neptune with trident presiding over the scene, an eagle spreading its wings above the central composition, figures on the quayside conducting the business of a working port. The label identifies the subject as the ancient harbor of Rome — Ostia Antica — depicted on a burial monument perhaps fifteen hundred years after the port it celebrates ceased to function. Someone in Renaissance Italy thought the harbor of ancient Rome was worth putting on a coffin. The choice tells you something about how the ancient port’s reputation persisted long after the silt had closed it.

In the National Maritime Museum in Haifa, a reproduction of a Roman maritime mosaic hangs above a scale model of a Roman grain ship. The mosaic — a copy of the type found decorating the floors of maritime collegia and wealthy houses at Ostia and other Roman port cities — shows the sea as Romans imagined it: dense with fish and marine creatures, alive with the visual abundance that the Mediterranean provided, a merchant vessel moving through a world of tuna, dolphins, an octopus, a whale. The sea in Roman mosaic art is not threatening; it is productive, teeming, the source of food and commerce and the medium through which the empire connected its parts. Below the mosaic, the grain ship model shows the vessel that made this connection real: broad-hulled, square-sailed, designed not for speed but for capacity, the workhorse of the most important supply chain in the ancient world.