Source of the Danube
As early as 1847 the following definition can already be found in the "Universallexikon des Großherzogtums Baden" (Universal Lexicon of the Grand Duchy of Baden): “Danube, the biggest river of Germany, rises at the Martinskapelle in a wild and lonely area of the Black Forest, is called Brege at its origin and forms the river Danube in Donaueschingen where it is unified with the Brigach." (German original: „Donau, der größte Fluß Deutschlands, entspringt bei der Martinskapelle in einer wilden und einsamen Gegend des Schwarzwaldes, heißt am Anfang Brege… und bildet erst in Donaueschingen, wo sie sich mit der Brigach vereinigt, die Donau.“)
Danubian corridor
In paleontology and archaeology, the Danubian corridor or Rhine-Danube corridor refers to a route along the valleys of the Danube River and Rhine River of various migrations of Eastern cultures from Asia Minor, the Aegean region, the Pontic-Caspian steppe, etc., into the north and northwest of Europe.