The map was drawn by Bartholomeu Velho in
1561. The shape of
South America is similar to that of Linschoten's or Blaeu's map of the
continent. The souvenir sheet was issued in 1994 to mark the 500th
anniversary of the signing of the Treaty of Tordesillas which divided
the world between Spain and Portugal. The arms of Portugal and Spain
appear on the map on either side of the Treaty line.