the Venetian Province to the Napoleonic Kingdom of Italy in the Treaty of Pressburg. Within the Kingdom of Italy, modern Belluno roughly corresponded to the department. After the Napoleonic Wars the former Venetian Province was returned to Austria by the 1815 Congress of Vienna, becoming part of the newly formed Kingdom of Lombardy–Venetia. Under Austrian rule Lombardy–Venetia was organised into provinces roughly corresponding to the Napoleonic departments; the Piave department was succeeded by the Province of Belluno, which broadly coincides with the modern province. During the unification of Italy Austria lost Lombardy–Venetia to what became the Kingdom of Italy (the western part (i.e. Lombardy) in 1859, the eastern part (i.e. Venetia and Mantua) including Belluno in 1866). In 1919, following World War I, Italy obtained what had been the southern part of the County of Tyrol from Austria-Hungary: Trentino and South Tyrol. In 1923 Cortina d'Ampezzo, Colle Santa Lucia and Livinallongo del Col di Lana were detached from this territory and added to Belluno. In 1943, when the Italian government signed an armistice with the Allies, the province was occupied by Nazi Germany, which reorganised it (along with the region of Trentino-Südtirol) as the Operation Zone of the Alpine Foothills and put it under the administration of Gauleiter Franz Hofer. The region was de facto annexed to the German Reich until the end of the war. This status ended along with the Nazi regime and Italian rule was restored in 1945. Economy Until recently, the province's economy was based on poor mountain agriculture, now less important, with the exception of the cultivation of beans in the Lamon highlands and the production of Piave cheese in the Dolomites valleys. Today, Belluno has one of the most important industrial sectors of northern Italy, the production of eyeglasses (Luxottica has its headquarters in Agordo, for example). Also important are the manufacturing sectors of home appliances (Zanussi and others) and bathroom fixtures (Ceramica Dolomite, IdealStandard). One of the most important factors of the Bellunese economy is tourism. Cortina d'Ampezzo, Alleghe, Arabba, Sappada, and other locations are renowned in Italy and abroad. Linguistic minorities In the province, language minorities are present and recognized by law: a Ladin minority, recognized in 42 municipalities, is present in the regions of Ladinia (Colle Santa Lucia-Col, Livinallongo del Col di Lana-Fodom and Cortina d'Ampezzo-Anpezo), Cadore, Agordino and Zoldo. a German-speaking minority was present in the municipalities of Farra d'Alpago