Columbia subject headings:
Harvard subject headings:
Portugal--Civilization--16th century.
Portugal--History--John II, 1481-1495.
Portugal--History--Manuel I, 1495-1521.
Princeton subject headings:
Gama, Vasco da, 1469-1524.
Portugal--History--16h century.
Portugal--Intellectual life--16th century.
Portugal--Social life and customs--16th century.