Trentino-Alto Adige/Südtirol (, ; ; ; ) is an autonomous region of Italy, located in the northern part of the country. The region has a population of 1.1 million, of whom 62% speak Italian as their mother tongue, 30% speak South Tyrolean German and several foreign languages are spoken by immigrant communities. Since the 1970s, most legislative and administrative powers have been transferred to the two self-governing provinces that make up the region: the Province of Trento, commonly known as Trentino, and the Province of Bolzano, commonly known as South Tyrol (Alto Adige in Italian). In South Tyrol, German remains the sizeable majority language. From the 9th century until 1801, the region was part of the Holy Roman Empire. After being part of the short-lived Napoleonic Republic of Italy and Napoleonic Kingdom of Italy, the region was part of the Austrian Empire and its successor Austria-Hungary from 1815 until its 1919 transfer to Italy in the Treaty of Saint-Germain-en-Laye at the end of World War I. Together with the Austrian state of Tyrol, it is part of the Euroregion Tyrol-South Tyrol-Trentino. In English language, the region is known as Trentino-South Tyrol or by its Italian name Trentino-Alto Adige. History The Romans conquered the region in 15 BC. After the end of the Western Roman Empire, it was divided between the invading Germanic tribes in the Lombard Duchy of Tridentum (today's Trentino), the Alamannic Vinschgau, and the Bavarians (who took the remaining part). After the creation of the Kingdom of Italy under Charlemagne, the Marquisate of Verona included the areas south of Bolzano, while the Duchy of Bavaria received the remaining part. From the 11th century onwards, part of the region was governed by the prince-bishops of Trent and Brixen, to whom the Holy Roman Emperors had given extensive temporal powers over their bishoprics. Soon, they were overruled by the Counts of Tyrol and Counts of Görz, who also controlled the Puster Valley: in 1363 its last titular, Margarete, Countess of Tyrol ceded the region to the House of Habsburg. The regions north of Salorno were largely Germanized in the early Middle Ages, and important German poets like Arbeo of Freising and Oswald von Wolkenstein were born and lived in the southern part of Tyrol. The two bishoprics were secularized by the Treaty of Lunéville of 1803 and given to the Habsburgs. Two years later, following the Austrian defeat at Austerlitz,