List of tributaries of the Danube
The Danube is Europe's second-longest river. It starts in the Black Forest in Germany as two smaller rivers—the Brigach and the Breg—which join at Donaueschingen, and it is from here that it is known as the Danube, flowing generally eastwards for a distance of some , passing through several Central and Eastern European capitals, before emptying into the Black Sea via the Danube Delta in Romania.
Danube Swabians
The Danube Swabians () is a collective term for the German-speaking population who lived in various countries of southeastern Europe, especially in the Danube River valley. Most were descended from 18th-century immigrants recruited as colonists to repopulate the area after the expulsion of the Ottoman Empire.