Bartolomeu Dias was a Portuguese mariner and explorer. In 1488, he became the first European navigator to round the southern tip of Africa and to demonstrate that the most effective southward route for ships lies in the open ocean, well to the west of the African coast. His discoveries effectively established the sea route between Europe and Asia.

John II, called the Perfect Prince, was King of Portugal from 1481 until his death in 1495, and also for a brief time in 1477. He is known for re-establishing the power of the Portuguese monarchy, reinvigorating the Portuguese economy, and renewing his country's exploration of Africa and Asia.