Located at the confluence of the two roads leading to the Moncenisio and Monginevro Alpine passes, for millennia the crossroads of transalpine routes between Italy and France, the City of Susa - at the centre of the valley of the same name - is rich in Roman and medieval monuments. In antiquity, it was the capital of the Kingdom of the Cozii, the starting point of the Via Domizia and the Via Cozia, and a stopping place on the Itinerarium burdigalense and the Via Francigena. The most important monuments in the archaeological park date back to Roman times: the Arch of Augustus, the Savoy Gate, the aqueduct and the amphitheatre. The medieval castle of Countess Adelaide dominates from the top of the hill and today houses the Civic Museum. Churches include the imposing Cathedral of San Giusto, the Church of San Francesco and the Church of the Bridge, home to the Diocesan Museum of Alpine Religious Art.