Sorry, no luck with the second question.

lesblank: it could be true, but I can't say for sure. The Student Prince is played nightly at Heidelberg but I don't know any German who ever went there (I studied in H. for four years). But it's crowded with American tourists I heard.

Joe: a "German" folksong? In a way yes, for I guess that more than half of all Germans could at least join in and hum the tune. But that definition would also make "Happy birthday to you" a German folksong, for nearly 100% of all Germans can actually sing it, though I doubt that much more than 10% know the German lyrics to this.

Wolfgang