March 3, 1263: French cardinal, Hugh of St. Cher, dies. He reputedly compiled the first Bible concordance and was the first person to divide the Old and New Testaments into chapters.
March 3, 1547: At the Seventh Session of the Council of Trent, the Roman Catholic church defines its theology of the sacraments. Arguing that seven sacraments are necessary for salvation—Baptism, Confirmation, the Eucharist, Penance, Extreme Unction, Orders, and Matrimony—the council rejected the teaching of most Protestants that only two were required: Baptism and the Lord's Supper.
April 19, 526: Justinian I is crowned Roman Emperor in Constantinople's magnificent cathedral, the Santa Sophia. Attempting to restore political and religious unity in the eastern and western empires, he ruthlessly attacked pagans and heretics and created the Code of Justinian, a massive restructuring of law (including much regarding the relationship of church and state) that would be the basis of legislation for nearly a millennium.
April 19, 1054: Pope Leo IX dies. Because Leo refused the title ...