Located 33 km from Rome, Campagnano extends its territory to Lake Martignano and the Veio Park.
Already an Etruscan village, with the defeat of Veio it became a Roman municipality and post station, for the refreshment of travellers and the changing of horses.
With the fall of the Roman Empire, the centre disintegrated into scattered settlements that suffered attacks by barbarian populations. In the Middle Ages it became a possession of the Annibaldi family and then passed to the Orsini. Under the new princes, Campagnano experienced a moment of great splendour, as can be seen from the numerous noble palaces and the majestic Collegiata di San Giovanni Battista with its Baroque tower.
A strategic point on the route to and from Rome, Campagnano is crossed by the Via Amerina and the Via Francigena, which sees its last stop here before reaching Rome.