Aosta is the main city of Aosta Valley, a bilingual region - the only one not divided into provinces - in the Italian Alps (north-northwest of Turin). The city is situated near to the Italian entrance to the Mont Blanc Tunnel. Aosta has Roman roots in its history and was mainly ruled by House of Savoy before 1861 (The Reign of Italy).Amongst its main sights one can mention the ancient town walls of Augusta Prætoria Salassorum, the Roman theatre, the Arch of Augustus, the Cathedral, the Romanesque-Gothic Sant'Orso.