Trentino-Alto Adige/Südtirol is an autonomous region in Northern Italy. 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.
From the 9th century until its annexation by Italy in 1919, the region was part of Austria-Hungary and its predecessors, the Austrian Empire and the Holy Roman Empire. Together with the Austrian state of Tyrol it is represented by the Euroregion Tyrol-South Tyrol-Trentino. With a past of poverty, the region is today among the wealthiest and most developed in both Italy and the whole European Union.
In English, the region is also known as Trentino-South Tyrol or by its Italian name Trentino-Alto Adige.
The region is bordered by East and North Tyrol (Austria) to the north-east and north respectively, by Graubünden (Switzerland) to the north-west, and by the Italian regions of Lombardy to the west and Veneto to the south and south-east. It covers 13,607 km2 (5,254 sq mi). It is extremely mountainous, covering a large part of the Dolomites and the southern Alps.The region is composed of two provinces, Trentino in the south and South Tyrol in the north.