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-Alto Adige, and the Province of Bolzano, commonly known as South Tyrol . 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.