European exploration of Africa
One of the ships under command of Diogo Dias arrived at a coast that was not in East Africa. Two years later, a chart already showed an elongated island east of Africa that bore the name Madagascar. But only a century later, between 1613 and 1619, did the Portuguese explore the island in detail. They signed treaties with local chieftains and sent the first missionaries, who found it impossible to make locals believe in Hell, and were eventually expelled.
Diogo Dias
During an expedition along the Cape of Good Hope (Diogo may have originally called it the Cape of Storms) with Pedro Álvares Cabral and his brother, Dias's ship got separated from the main fleet during the crossing of Cape of Good Hope (his brother's ship was lost during that crossing). Having struck a route too far east, Dias was the first European to sight the island of Madagascar and is often credited with naming the island of "São Lourenço", on account of it being found on St. Lawrence's day (August 10, 1500). Although the island was not unknown; its existence and Arabic name, "Island of the Moon", was already reported by Pêro da Covilhã back in 1490.