" Infante Dom Henrique de Avis, Duke of Viseu, better known as Prince Henry the Navigator of Portugal, was the fifth child of King John I. The prince was a responsible ruler and is remembered for developing Portugal’s trade routes with foreign countries, exploring the islands along the central spine of the Atlantic Ocean and sailing along the western coast of Africa in search of new trade routes to the Far East.
The 15th century was exciting as well as dangerous. It was a time when exploring meant going to sea and discovering new lands inhabited by many people that were previously unknown to Europeans. The explorations started in about 1418, when two Portuguese ships were inadvertently driven off-course by a storm. The vessels grounded onto the island now known as Porto Santos. The captains, João Gonçalves Zarco and Tristão Vaz Teixeira, who had been commissioned by Prince Henry the Navigator, saw heavy clouds in the distance, under which lay the island of Madeira. Eight years later, Diogo de Silves discovered islands north of Madeira, now known as the Azores. "

― Hank Bracker