February 23, 155 (traditional date): Polycarp, the bishop of Smyrna, is martyred. Reportedly a disciple of the Apostle John, at age 86 he was taken to be burned at the stake. "You try to frighten me with fire that burns for an hour and forget the fire of hell that never burns out," he said. The flames, legend says, would not touch him, and when he was run through with a sword, his blood put the fire out.
February 23, 303: Diocletian begins his "Great Persecution," issuing edicts that call for church buildings to be destroyed, sacred writings burned, Christians to lose civil rights, and clergy to be imprisoned and forced to sacrifice. The following year he went even further, ordering all people to sacrifice on pain of death.
February 23, 1455 (traditional date): Johannes Gutenberg publishes the Bible, the first book ever printed on a press with movable type.