Columbia subject headings:
Harvard subject headings:
Valletta (Malta)--Buildings, structures, etc.
Valletta (Malta)--Civilization.
Valletta (Malta)--History.
Princeton subject headings:
Historic buildings--Malta--Valletta.
Malta--History.
Manners and customs.
Urbanization--Malta--Valletta.
Valletta (Malta)--History.
Valletta (Malta)--Religious life and customs.