The St. Nikola Abbey is a former monastery of the Augustinian canons and today's mother house of the German Oratory Sisters in Passau, Lower Bavaria, Germany.
Wikipedia https://en.wikipedia.org/wiki/Abbey_of_St._Nikola_in_Passau
Address 15A Kleiner Exerzierplatz, Passau 94032, Germany
Coordinates 48°34'13.747" N 13°27'24.726" E