Danube
The blue Danube, celebrated in a song of the same name, flows through Germany, Hungary, Serbia, Croatia, Austria, Slovakia, Romania and Bulgaria. At 1,780 miles long, the Danube is Europe’s longest river.
Baldric, I agree the answer to the OP question is the Danube, but your statement.....
//At 1,780 miles long, the Danube is Europe’s longest river// ....is just plain wrong.
How many more times, I know the answer to the question is the Danube. All I'm pointing out is your statement is incorrect. All you have to do is admit it. There's nothing to be ashamed of is there.
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