Complex sentence: Altenburg Abbey (Stift Altenburg) is a Benedictine monastery in Altenburg in Lower Austria, about to the north of Krems an der Donau in the Waldviertel.
Split into simpler sentences: Altenburg Abbey (Stift Altenburg) is a Benedictine monastery in Altenburg in Lower Austria. It is situated about to the north of Krems an der Donau in the Waldviertel.