Columbia subject headings:
Castile (Spain)--History.
Demarcation line of Alexander VI.
Portugal--Foreign relations--Spain.
Spain--Foreign relations--Portugal.
Spain--History--16th century.
Tratado de Tordesillas--History.
Harvard subject headings:
America--Discovery and exploration--Spanish.
Portugal--Foreign relations--Spain.
Portugal--Foreign relations--To 1580.
Portugal. Treaties, etc. 1494 June 7.
Spain--Foreign relations--1479-1516.
Spain--Foreign relations--Portugal.
Princeton subject headings:
Castile (Spain)--History.
Demarcation line of Alexander VI.
Portugal--Foreign relations--Spain.
Spain--Foreign relations--Portugal.
Spain--History--16th century.
Tratado de Tordesillas--History.