Columbia subject headings:
Castles--Germany--Heidelberg--Designs and plans--Inventories.
Generallandesarchiv Karlsruhe. Schlossbaubüro--Inventories.
Heidelberg (Germany)--Buildings, structures, etc.
Heidelberger Schloss (Heidelberg, Germany)--Designs and plans.
Harvard subject headings:
Generallandesarchiv Karlsruhe. Schlossbaubüro.
Heidelberg (Germany)--Buildings, structures, etc.
Heidelberger Schloss (Heidelberg, Germany)
Princeton subject headings: