Constantius Chlorus dies, leaving his son Constantine as his successor. Constantine would go on to defeat his rival and co-emperor Maxentius at the Battle of Milvian Bridge. This allows Constantine to become the sole emperor of Rome and eventually leads to the establishment of Christianity as the official religion.
The First Council of Nicea ended.
Birth of Alfonso I Henriques of Portugal at Guimaraes. The first king of Portugal, Alfonso would create the nation of Portugal by liberating it from Muslim invaders and attempts at dominance from Castile in Spain.
Michael VIII Palaeologus (1224 - 1282) finally drives the Latin rulers out of Constantinople and reestablishes Eastern Orthodox rule after 50 years. To solidify his own position he has John IV Lascaris, last of the Lascaris line and his co-emperor, blinded and thus rendered ineligible to become emperor.
Battle of Tannenberg: Forces from Poland and Lithuania defeated the Teutonic Knights.
John Taylor, third leader of the Mormon church after Joseph Smith and Brigham Young, dies.
American philosopher Eric Hoffer was born.
Pope Paul VI published the encyclical 'Humanae Vitae,' emphasizing the Catholic position on family and condemning all artificial methods of birth control.
On this date, the first "test tube" baby was born, launching a debate into the ethics of in vitro fertilization which has mostly been resolved in favor of it, but many people - including many religious leaders - continue to object.
The formal state of war between Israel and Jordan ends when King Hussein and Prime Minister Yitzhak Rabin sign the Washington Declaration at the White House.
Feast Day of Saint James.
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