Some notable facts about this date, for more, visit http://www.onthisday.com
Facts
768 Charlemagne and his brother Carloman I are crowned Kings of The Franks
1000 Leif Ericson discovers "Vinland" (possibly L'Anse aux Meadows, Canada) reputedly becoming first European to reach North America
1446 The Hangul alphabet is published in Korea
1831 Ioannis Kapodistrias, first Head of State of modern Greece, assassinated in Nafplion
1941 US President Franklin D. Roosevelt approves an atomic program - beginning of the Manhattan project
2006 North Korea allegedly tests its first nuclear device.
I think it is very interesting North Korea allegedly conducted its first test on the same date that the US approved the atomic program which began the invention of the nuclear bomb.
Deaths
1047 Clemens II, [Suitger], Pope (1046-47), dies (b. 1005)
1273 Elisabeth of Bavaria, Queen of Germany
1806 Benjamin Banneker, African American astronomer, mathematician and surveyor of Washington D.C., dies at 74
1967 Ernesto "Che" Guevara, Argentine Marxist revolutionary and physician, executed in Bolivia at 39
1974 Oskar Schindler, Austrian businessman and subject of the novel "Schindler's Ark" and the film "Schindler's List", dies at 66
1995 Alec Douglas-Home, British Prime Minister (Conservative: 1963-64), dies at 92
2006 Paul Hunter, English professional snooker player (b. 1978)
2015 Geoffrey Howe, British politician (Chancellor and Foreign Secretary under Thatcher), dies at 88
2015 Gordon Honeycombe, British broadcaster/author, dies at 79