Columbia subject headings:
Architecture, Medieval--Italy--Lucca.
City walls--Italy--Lucca.
Lucca (Italy)--Buildings, structures, etc.
Lucca (Italy)--Defenses.
Lucca (Italy)--History--To 1500.
Harvard subject headings:
Architecture, Medieval--Italy--Lucca.
City walls--Italy--Lucca.
Lucca (Italy)--Buildings, structures, etc.
Lucca (Italy)--Defenses.
Lucca (Italy)--History--To 1500.
Princeton subject headings:
City walls--Italy--Lucca.
Lucca (Italy)--Buildings, structures, etc.
Lucca (Italy)--Defenses.