Figure 3.8 - Rome, the aqueduct system. Key: A, Capitoline Hill; B, Palatine Hill; 1, Forum Romanum; 2, sequence of imperial fora; 3, Colosseum; 4, Baths of Caracalla; 5, Baths of Diocletian; 6, Praetorium barracks; 7, Pantheon; 8, Mausoleum of Hadrian; 9, Circus Maximus.

The majority of the aqueducts entered the city at its eastern corner. Identified from north to south these were: Aqua Appia, which runs through to the Aventine Hill; Aqua Marcia and, on the same aqueduct into the city, the combined Aqua Tepula and Aqua Julia; Anio Vetus; Aqua Claudia and Anio Novus, both carried on the same arches for the last seven miles into the city. The Aqua Virgo entered Rome from the north and served the low-lying Campus Martius district; Aqua Traiana and Aqua Aurelia served the Trastevere district from the west and water was also carried to this part of the city by service aqueducts crossing the Tiber on the bridges. The Aqua Marcia Antoniniana served the Baths of Caracalla from the south-east (not shown on map).