Bavaria (German: Freistaat Bayern (help·info); IPA: [fraɪ.ʃtaːt ˈbaɪ.ɐn] English: Free State of Bavaria), with an area of 70,548 square kilometres (27,200 sq mi) and almost 12.5 million inhabitants, is located in the southeast of Germany and is the largest federated state (Bundesland) of Germany by area. Its capital is Munich in Upper Bavaria.
Modern Bavaria also includes parts of the historical regions of Franconia and Swabia. Neighbouring states within Germany are Baden-Württemberg, Hesse, Thuringia and Saxony. International borders are shared with Austria and the Czech Republic. The Bavarian Alps form the border with Austria, and within the range is the highest peak in Germany, the Zugspitze. Switzerland can be reached directly by crossing Lake Constance. Two major rivers flow through the state, the Danube (Donau) and the Main.
The Wittelsbach family is a European royal family and a German dynasty from Bavaria. Their major principal roles were as Dukes, Electors and Kings of Bavaria (1180-1918), Counts Palatine of the Rhine (1214-1803), Margraves of Brandenburg (1323-1373), Counts of Holland, Hainaut and Zeeland (1345-1432), Elector-Archbishops of Cologne (1583-1761), Dukes of Jülich and Berg (1614-1794/1806), Kings of Sweden (1654-1720) and Kings of Greece (1832-1862). The family also provided two Holy Roman Emperors.
...that there is a Bavarian citizenship (as opposed to a German citizenship)? Actually, the Bavarian constitution (Bavaria has a separate constitution that exists alongside the German constitution) explicitly provides for it in articles 6 and 7. Specifically, you become a Bavarian citizen by birth, by marriage or by being naturalized.