Columbia subject headings:
Architecture, Domestic--Conservation and restoration--Portugal--Lisbon.
Lisbon (Portugal)--Buildings, structures, etc.
Palaces--Conservation and restoration--Portugal--Lisbon.
Quinta Alegre (Lisbon, Portugal)
Harvard subject headings:
Princeton subject headings:
Architecture, Domestic--Conservation and restoration--Portugal--Lisbon.
Lisbon (Portugal)--Buildings, structures, etc.
Palaces--Conservation and restoration--Portugal--Lisbon.
Quinta Alegre (Lisbon, Portugal)