Columbia subject headings:
Architecture--Italy--Vigevano.
Castello di Vigevano (Italy)
Castles--Italy--Vigevano.
Vigevano (Italy)--Description and travel.
Harvard subject headings:
Architecture--Italy--Vigevano.
Castello Sforzesco (Vigevano, Italy)
Ludovico Sforza, Duke of Milan, 1452-1508
Vigevano (Italy)--Buildings, structures, etc.
Princeton subject headings:
Architecture--Italy--Vigevano.
Castello di Vigevano (Italy)
Castles--Italy--Vigevano.
Vigevano (Italy)--Description and travel.