Columbia subject headings:
Helmstedt (Germany)--Buildings, structures, etc.
Kloster Mariental (Mariental, Germany)
Harvard subject headings:
Helmstedt (Germany)--Buildings, structures, etc.
Kloster Mariental (Mariental, Germany)
Mariental (Germany)--Buildings, structures, etc.
Princeton subject headings:
Kloster Mariental (Mariental, Germany)