From the Wikipedia page 
Regensburg (German pronunciation: [ˈʁeːɡŋ̍sbʊɐ̯k]; Latin: Castra-Regina; Polish: Ratyzbona; Czech: Řezno; French: Ratisbonne; older English: Ratisbon; Bavarian: Rengschburg or Rengschburch) is a town in south-east Germany, at the confluence of the Danube, Naab and Regen rivers. With over 140,000 inhabitants, Regensburg is the fourth-largest city in the State of Bavaria after Munich, Nuremberg and Augsburg. The city is the political, economic and cultural centre of eastern Bavaria and capital of the Upper Palatinate.
The Lord Mayor and the City Council are elected for a period of six years. Both elections take place at the same time. The City Council is composed of 51 members and includes the Lord Mayor, two deputy mayors, five counsellors and the other council members.
Regensburg is subdivided into 18 boroughs (Stadtbezirke): Innenstadt, Stadtamhof, Steinweg-Pfaffenstein, Sallern-Gallingkofen, Konradsiedlung-Wutzlhofen, Brandlberg-Keilberg, Reinhausen, Weichs, Schwabelweis, Ostenviertel, Kasernenviertel, Galgenberg, Kumpfmühl-Ziegetsdorf-Neuprüll, Großprüfening-Dechbetten-Königswiesen, Westenviertel, Ober- und Niederwinzer-Kager, Oberisling-Graß, Burgweinting-Harting. Each borough contains a number of localities (Ortsteile), which can have historic roots in older municipalities that became urbanized and incorporated into the city.