Gregory XIII

Gregory XIII was a pope from 1572 to 1585, best known for introducing the Gregorian calendar, which reformed the calendar system used in Western countries. The change addressed inaccuracies in the Julian calendar, which had led to a drift in the dates of key events, like equinoxes. His reform established a more accurate system that is still in use today. Additionally, Gregory XIII supported the Catholic Counter-Reformation efforts, promoting the Catholic faith through education and religious orders. His papacy played a significant role in shaping not just the Church, but also the calendar we follow now.