Columbia subject headings:
Castles--Conservation and restoration--Netherlands--Helmond.
Castles--Netherlands--Helmond.
Excavations (Archaeology)--Netherlands--Helmond.
Helmond (Netherlands)--Buildings, structures, etc.
Harvard subject headings:
Architecture, Medieval--Netherlands--Helmond.
Castles--Netherlands--Helmond--History.
Helmond (Netherlands)--Buildings, structures, etc.
Power (Social sciences)--Netherlands--Helmond.
Princeton subject headings: