Aosta Valley (Valle d’Aosta in Italian, Vallée d’Aoste in French) is the smallest and least populated region of Italy, located at the northwestern corner of the country, at the border with France and Switzerland. The region is occupied by a central valley surrounded by some of the highest and most famous peaks of the Alps. Aosta Valley is bilingual, with Italian and French as official languages. However, most people speak a local variety of Franco-Provençal, while there are also some German-speaking communities. The region was initially inhabited by the Salassi and later settled by the Romans. During the Middle Ages, many castles were built in the region, and it became an important part of the domains of the Savoy family, finally joining Italy during the unification of the country. Aosta Valley is now a popular tourist destination thanks to its beautiful environment and many ski resorts, and it is also among the richest regions of Italy.