The cantons Uri, Schwyz, Unterwalden (Nidwalden and Obwalden together are called "Unterwalden") are called "Urkantone". An Urkanton is a canton that existed since the foundation of Switzerland in 1291. With time, other cantons joined Switzerland. "Jura" is the newest canton in Switzerland since 1978. In that year, it split from the canton of Berne, after some rioting.