1443:

Pope Julius II

One of the most powerful rulers of the Renaissance, Julius was more concerned with political matters than theological ones, working hard to restore and preserve the Papal States and leading military efforts to hold off the encroaching forces of France. When defecting cardinals threatened another schism, he called the Fifth Lateran Council, and overturned another military coup with the help of Swiss troops.

Though he was enormously successful in keeping Italy together politically and militarily, Julius is perhaps best known as a patron of the arts, and is particularly remembered for his patronage of Michelangelo, who completed the Ceiling of the Sistine Chapel barely a year before the pope's death.

532:

Saint Sabas

Sabas (or Sabbas) founded the monastery known as the Great Laura of Mar Saba and championed orthodoxy in controversies over the nature of Christ.