December 10, 1520: German reformer Martin Luther publicly burns Pope Leo X's bull "Exsurge Domine," which had demanded that Luther recant his heresies—including justification by faith alone (see issue 34: Luther's Early Years).
December 10, 1561: German theologian Caspar Schwenkfeld, a reformer who fell out of favor with the "mainstream" Reformation movement because of his Christology (he believed Christ's humanity was deified), dies (see issue 21: Caspar Schwenkfeld).
December 10, 1824: Scottish writer and poet George MacDonald, whose fairy tales and mythopoetic novels inspired C.S. Lewis, is born (see issue 7: C.S. Lewis).
February 27, 280: Constantine, the first Roman emperor converted to Christianity, is born. Though some scholars question the authenticity of Constantine's conversion (which came after he saw a vision on the battlefield), the emperor did seek to settle church controversies by calling the Council of Nicea in 325 (see issue 57: Converting the Empire).
February 27, 380: Roman emperor Theodosius makes Christianity the official law of the land. "It is our will," he decreed, "that all the peoples we rule ...