Columbia subject headings:
Castello del Monte (Italy)
Castles--Italy--Design and construction.
Great Pyramid (Egypt)
Pyramids--Egypt--Design and construction.
Harvard subject headings:
Architecture and religion.
Architecture--Egypt
Church architecture--Europe--Designs and plans.
Frederick II, Holy Roman Emperor, 1194-1250--Knowledge--Great Pyramid (Egypt)
Great Pyramid (Egypt)
Monasteries--Europe--Designs and plans.
Pyramids--Egypt--Design and construction
Princeton subject headings:
Castello del Monte (Italy)
Castles--Italy--Design and construction.
Great Pyramid (Egypt)
Pyramids--Egypt--Design and construction.