Death of Saint Alphege, also Elphege, a Benedictine monk who became the Archbishop of Canterbury, who was martyred for his faith by the Danes.
Death of Pope Saint Leo IX, the 152nd successor of Peter. It was Leo who excommunicated Michael Cerularius who became the Eastern Patriarch and caused the great schism between East and West that exists to this day. Born in Lorraine, he was freely elected by the clergy and people of Rome on March 12, 1049. Before he entered Rome, while at the gates of Rome, he divested his sandals and walked bare-foot to the Lateran as a sign of humility. Though humble, he was staunch on defending the faith and that included taking on Cerularius.
Eight years after the Diet of Worms by the Holy Roman Emperor a protestation was published against it and from that evolved the term "Protestant."
Birth of Saint Felix of Valois, a French hermit who, along with Saint John of Malta would found the Order of the Most Holy Trinity, also known as Trinitarians whose specific mission was to ransom captives from the Moors