As King of Spain, Philip II was one of the wealthiest men in the world
Spanish explorers had returned from voyages to South America with vast treasures from Spain's new colonies
Philip II's conquests overseas had received the Pope's blessing, so he saw it as his religious duty to expand his power and influence
In 1554, two years before he became king, Philip II married Queen Mary I of England
As long as he was married, he would be joint monarch with her
The aim was to unite the Catholic world, but Mary and Philip had no children
When Elizabeth became queen, Philip did not waste time and quickly issued a marriage proposal
She did not refuse, but just kept him waiting
For a number of years England and Spain were at peace