The Roman Decumanus and Cardo Walk along the ancient stone-paved streets still marked by the Latin alphabet carved by Roman workers. These roads once connected houses, workshops, and temples in a perfectly planned grid — a vision of urban order centuries before Venice’s winding alleys. The Domus Quarter and Mosaics Discover the remains of elegant patrician houses with mosaic floors in black, white, and glass paste. Admire symbolic decorations — from the knot of Solomon to the Dionysian panther — that reflect Roman taste, ritual, and domestic beauty. The Harbour Gate (Porta-Approdo) Stand before the monumental harbour entrance that faced the lagoon, where ships from the Adriatic once arrived. Here, Altinum truly reveals its amphibious nature — a city of canals, bridges, and trade long before the time of Venice.