Carcassonne?
Not France or Carcasonne. Bavaria was closer.Carcassonne?
Yes! GermanyGermany?
It is monasticOK, so it's 140 miles west of Bavaria (but, not sure where in Bavaria to start measuring, browsing a map of Germany this puts us in France from the border, so maybe we're talking more the center of Bavaria or what's more commonly thought of as Bavaria)? I think some people missed this. And though it could have been on the Swiss border, that's too far south. And Luxembourg is too far north. And so it's definitely not Slovakia! Probably somewhere between say Frankfurt and Stuttgart. Or in the Black Forest.
I don't think it's a castle, I'm thinking Monastery. Maybe one where they make beer!
I don't have time at the moment but maybe it'll get someone closer. I could be wrong, obviously, but I think that's where I'll be looking if I end up with time. Roughly southwestern area of Germany, for a huge monastery
Comburg MonasteryNow you about 70 miles, by car, too far west & slightly south, but not Maulbronn
Yes! Also known as Grosscomburg in Schwabish HallComburg Monastery
Correct county.