Columbia subject headings:
Guinigi family.
Lucca (Italy)--Buildings, structures, etc.
Lucca (Italy)--History.
Towers--Italy--Lucca.
Harvard subject headings:
Guinigi family.
Lucca (Italy)--Buildings, structures, etc.
Lucca (Italy)--History.
Towers--Italy--Lucca.
Princeton subject headings:
Guinigi family.
Lucca (Italy)--Buildings, structures, etc.
Lucca (Italy)--History.
Towers--Italy--Lucca.