Columbia subject headings:
Chiesa di Santa Caterina d'Italia (Valletta, Malta)
Church architecture--Conservation and restoration--Malta--Valletta.
City walls--Conservation and restoration--Malta--Valletta.
Historic buildings--Conservation and restoration--Malta--Valletta.
Valletta (Malta)--Buildings, structures, etc.--Conservation and restoration.
Harvard subject headings:
Princeton subject headings:
Chiesa di Santa Caterina d'Italia (Valletta, Malta)
City walls Conservation and restoration--Malta--Valletta.
City walls--Malta--Valletta.
Valletta (Malta)--Buildings, structures, etc.