Tübingen (German: [ˈtyːbɪŋən], , Swabian: Dibenga) is a traditional university city in central Baden-Württemberg, Germany. It is situated 30 km (19 mi) south of the state capital, Stuttgart, and developed on both sides of the Neckar and Ammer rivers. As of 2014 about one in three of the 90,000 people living in Tübingen is a student. As of the 2018/2019 winter semester, 27,665 students attend the Eberhard Karls University of Tübingen. The city has the lowest median age in Germany, in part due to its status as a university city. As of December 31, 2015, the average age of a citizen of Tübingen is 39.1 years. The city is known for its veganism and environmentalism.