Bolzano is part of the Trentino Alto Adige region in Italy and capital of the province South Tyrol. The province borders Switzerland and Austria and its capital, the city of Bolzano, is one of only five mainly Italian-speaking cities in Trentino - Alto Adige. The province has a total of 116 comuni. The territory is characterized by the many castels that were build centuries ago, there are more than 90 castles in this region, including the Tyrol Castle, which is responsible for the region's name.