Nicolas V was pope of the Roman Catholic Church, from 1447, to his death, in 1455. His real namw was Tommaso Parentucelli. He was born on 15. November 1397, and died 24. March 1455). His father was a doctor, and he was the first humanist pope. Some of his successes were the resignation of Amadeus VIII., who was an Anti-pope, in 1449. He made a Papal Bull, called Dum diversas. In it, he autohrized Afonso V of Portugal to to conquer the lands of the non-believers, to chase their inhabitants away, to subjugate them, and to put them into a state of slavery. This legitimized Colonialism. There was also the Fall of Constantinople, in 1453, which ended the Eastern Roman Empire.