Columbia subject headings:
Palaces--Conservation and restoration--Italy--Lucca--Congresses.
Palaces--Italy--Lucca--History--18th century--Congresses.
Palaces--Italy--Lucca--History--19th century--Congresses.
Harvard subject headings:
Lucca (Italy)--Buildings, structures, etc.--Congresses.
Palaces--Conservation and restoration--Italy--Lucca--Congresses.
Palaces--Italy--Lucca--History--18th century--Congresses.
Palaces--Italy--Lucca--History--19th century--Congresses.
Princeton subject headings:
Lucca (Italy)--Buildings, structures, etc.--Congresses.
Palaces--Conservation and restoration--Italy--Lucca--Congresses.
Palaces--Italy--Lucca--History--18th century--Congresses.
Palaces--Italy--Lucca--History--19th century--Congresses.