800-Pope Leo III crowns Charles the Great (Charlemagne), Roman Emperor
1066-William the Conqueror is crowned King of England at Westminster Abbey, completing the Norman conquest of England
1741-Astronomer Anders Celsius introduces Centigrade temperature scale
1868-Despite bitter opposition, US President Andrew Johnson grants unconditional pardon to all persons involved in Southern rebellion (Civil War)
1926-Crown Prince Hirohito of Japan assumes the throne upon his father, Emperor Yoshihito's, death
1965-U.S. President Lyndon B. Johnson orders a halt to bombing operations in North Vietnam, hoping to spur peace talks
1989-Japanese scientist achieve -271.8°C, coldest temperature ever recorded
1991-Mikhail Gorbachev formally resigns as President of USSR in a televised speech