Leonardo da Vinci took as a central element the human person, his thoughts, his reality, his interests, Leonardo da Vinci stood out in the representation of nature and proportions. Humanism was characterized by the freedom of people from the rules of medieval Christianity. Humanism created a scientific behavior free from norms. In the Middle Ages God was thought to be the center of the universe. In the rebirth man is placed in the center of the world and life is considered worthy of being lived deep. The main consequence of this was a revaluation of the world and of the human being. Humanism restored faith in men, changed the way of thinking about the world, considered the importance of man, his intelligence, in his superior value. You appreciate the effort, the overcoming, and the knowledge. Still believing in God, they gave this new life more courage and were interested in studying nature.