Columbia subject headings:
Architecture--Portugal--History--20th century.
Architecture--Portugal--History--21st century.
Providência, Paulo.
Harvard subject headings:
Architecture--Portugal--20th century.
Architecture--Portugal--21st century.
Architecture--Portugal--21th century.
Providência, Paulo, 1962-
Providência, Paulo.
Princeton subject headings:
Architecture--Portugal--20th century.
Architecture--Portugal--21th century.
Providência, Paulo.