Columbia subject headings:
Architecture, Renaissance--Italy--Senigallia.
Della Rovere family.
Historic towers--Italy--Senigallia.
Rocca Roveresca (Senigallia, Italy)--History.
Senigallia (Italy)--Buildings, structures, etc.
Harvard subject headings:
Architecture, Renaissance--Italy--Senigallia.
Della Rovere family.
Historic towers--Italy--Senigallia.
Rocca Roveresca (Senigallia, Italy)--History.
Senigallia (Italy)--Buildings, structures, etc.
Princeton subject headings: