Major Contribution: His sculptures like David are considered highly in terms of the renaissance era

Why He Matters: He made impossible seaming feats when making his sculptures

Major Contribution: He wrote a lot of plays like Hamlet and Romeo and Juliet,

Major Contribution: He used his telescope to observe the moons around Jupiter, which helped prove that the Earth orbits the sun.

Why He Matters: His work, which used observation and experiments, helped show the importance of the scientific method.

Major Contribution: He published the Ninety-five Theses, arguing that salvation was based on faith alone and not on performing good deeds.

Why He Matters: His actions broke the power and unity of the Catholic Church and led to the creation of new Christian faiths.

Major Contribution: He wrote Institutes of the Christian Religion and is known for his doctrine of predestination.

Why He Matters: Calvin's theology gave the Protestant influence in Europe and America

Major Contribution: She established the moderate Protestant Church of England, providing the stable "Golden Age"

Why She Matters: Her long reign secured Protestantism in England, allowing the nation to push forward culturally and politically. 

Major Contribution: He wrote The Spiritual Exercises and directed the Jesuits to become a powerful force in education.

Why He Matters: Loyola was a key figure in the Catholic Counter-Reformation, providing a strong spiritual response to Protestantism.