Bélem Tower Belém most monumental and historical area It was from here that many of the great Portuguese explorers embarked on their voyages of discovery: Prince Henry the Navigator and the first overseas expedition to conquer Ceuta in Morocco, Bartholo. Bélem Tower Belém most monumental and historical area It was from here that many of the great Portuguese explorers embarked on their voyages of discovery: Prince Henry the Navigator and the first overseas expedition to conquer Ceuta in Moroc