Columbia subject headings:
Harvard subject headings:
Castles--Silesia--History.
Castles--Silesia.
Excavations (Archaeology)--Silesia.
Silesia (Czech Republic)--History.
Princeton subject headings:
Castles--Czech Republic--Silesia--History.
Castles--Czech Republic--Silesia.
Excavations (Archaeology)--Czech Republic--Silesia.
Silesia (Czech Republic)--History.