Columbia subject headings:
Historic buildings--Conservation and restoration--Italy--Pisa.
Navy-yards and naval stations--Italy--Pisa--History.
Pisa (Italy)--Buildings, structures, etc.
Shipyards--Italy--Pisa--History.
Harvard subject headings:
Historic buildings--Conservation and restoration--Italy--Pisa.
Navy-yards and naval stations--Italy--Pisa--History.
Pisa (Italy)--Buildings, structures, etc.
Shipyards--Italy--Pisa--History.
Princeton subject headings: