Wikipedia:Selected anniversaries/December 25

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 * 1046 – Henry III was crowned Holy Roman Emperor by Pope Clement II.
 * 1066 – Norman Conquest: William the Conqueror was crowned King of England at Westminster Abbey, but continued to face rebellions over the following years and was not secure on the throne until after 1072.
 * 1100 – Baldwin I was crowned the first king of Jerusalem (depicted) in the Church of the Nativity in Bethlehem.
 * 1809 – American physician Ephraim McDowell performed the world's first removal of an ovarian tumor.
 * 1831 – A Baptist preacher named Samuel Sharpe began an unsuccessful eleven-day slave revolt in Jamaica.
 * 1941 – Second World War: The Japanese occupation of Hong Kong began when Mark Aitchison Young, the Governor of Hong Kong, surrendered the territory to Japan after 18 days of fierce fighting.
 * 1950 – Four Scottish university students removed the Stone of Scone, used in the coronations of Scottish and British monarchs, from Westminster Abbey in London.


 * 1989 – Romanian Revolution: Communist dictator Nicolae Ceaușescu and his wife Elena were condemned to death on a wide range of charges and executed.
 * 1990 – British computer programmer Tim Berners-Lee introduced WorldWideWeb, the world's first web browser and WYSIWYG HTML editor.
 * 1991 – In a nationally televised speech, Mikhail Gorbachev resigned as President of the Soviet Union.
 * 2007 – A tiger at the San Francisco Zoo escaped from its enclosure and attacked three patrons before it was shot and killed.
 * 2009 – Aboard Northwest Airlines Flight 253, Umar Farouk Abdulmutallab attempted to detonate plastic explosives hidden in his underwear.
 * 2009 – A fire destroyed Longford's 19th-century St Mel's Cathedral, considered the "flagship cathedral" of the Irish midlands.
 * 2016 – A Tupolev Tu-154 of the Russian Defence Ministry crashed into the Black Sea shortly after taking off from Sochi International Airport, killing all 92 people on board.
 * Born/died: | Zhang Jingda |d|936| Peter the Venerable |d|1156| Sverker I of Sweden |d|1156| Lady Grizel Baillie |b|1665| Dorothy Wordsworth |b|1771|   Otto Frederick Hunziker |b|1873| Young Tom Morris |d|1875| Fatima Massaquoi |b|1912| George Koval |b|1913| Atal Bihari Vajpayee |b|1924| China Machado |b|1929|  Joan Miró |d|1983