Franzensfeste (German: [ˈfrantsn̩sˌfɛstə]; Italian: Fortezza [forˈtettsa]) is a comune and a village in South Tyrol in northern Italy. It is named after the large Franzensfeste Fortress erected from 1833 to 1838 and Franzensfeste station is also known as an important railway hub.

Franzensfeste is located in the southern Wipptal valley on the Eisack river, about 19 kilometres (12 mi) south of Sterzing and 11 kilometres (7 mi) north of Brixen. The settlement is situated on the western side of the valley, at the Sachsenklemme narrow where it is only a few hundred meters wide, along with the Brenner Railway line and the state road SS12 while the Autostrada A22 (Brenner Highway), running elevated on the same side, pass through the lake in its northern part entering a tunnel on the opposite side; the state road cross than the Eisack river nearby the railway station due north. The valley is confined by the Zillertal Alps in the northeast and the Sarntal Alps in the southwest, rising up to the Tagewaldhorn peak at 2,708 m (8,885 ft).

Franzensfeste was founded recently. The village dates from the 19th century when the construction of the fortifications was begun, to which the site is also closely linked in name (into Italian language), and the railway. The parish was originally Mittewald, still the common land, with the two villages of Oberau and Unterau.

Archeological findings have shown the area to be settled by 2500 B.C. as indicated by the finding of home pottery. The Wipptal has always played an important role in the transit of goods on the north-south bound, first as the Amber Road between Greece, Sicily and Northern Europe later in the Roman period, between Aquileia and the regions beyond the Alps; also a 140-metre (460 ft) long stretch of the Roman Via Claudia Augusta has been unearthed.

In the 17th century, where the station is now placed, there were a few farms, one of which, was turned into an inn with the name "Post-Reifer". It is still in operation today.

The military importance of the place became evident during the Tyrolean Rebellion in 1809 when General François Joseph Lefebvre, commander of 2500 Royal Saxon troopers, was defeated in an ambush by Andreas Hofer’s Tyrolean insurgents at the narrow which later was called Sachsenklemme ("Gorge of the Saxons”).

In the 1830s, Emperor Francis I of Austria wanted to build a defensive system on the strategically-important Brenner route since he feared an invasion from the south. The village was settled for strategic purposes, was well protected by the surrounding mountainous and could block the entrance to the Eisack Valley. Work began on June 17, 1833, and the Franzensfeste Fortress was inaugurated by Franz' successor Emperor Ferdinand I of Austria on August 18, 1838. The construction of the fortress and later of the Brenner railway, helped thousands of workers who found accommodation in Franzensfeste contributing to the development and growth of the village.

In 1867 with the opening of a station on the Brenner Railway, Franzensfeste consolidated its role as a transport hub not only on the north-south direction, but also with the eastern branch-off into the Puster Valley (the Puster Valley Railway) to Carinthia and the Austrian Southern Railway line at Maribor in Styria, opened in 1871. The Franzensfeste Fortress, however, lost its strategic importance with the signing of the Triple Alliance military agreement by Germany, Austria-Hungary and the Kingdom of Italy in 1882. The fortifications were transformed into a military ammunition depot, which kept even when was transferred to Italy according to the 1919 Treaty of Saint-Germain.