Wikipedia:Selected anniversaries/January 11

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 * 1055 – Theodora Porphyrogenita (pictured) became the sole ruler of the Byzantine Empire after the death of her brother-in-law Constantine IX Monomachos.
 * 1787 – German-born British astronomer William Herschel discovered two Uranian moons, later named Oberon and Titania by his son John.
 * 1863 – American Civil War: The Battle of Arkansas Post concluded with the Union Army capturing a fort from Confederate forces near the mouth of the Arkansas River.
 * 1912 – Immigrant textile workers in Lawrence, Massachusetts, went on strike in response to a pay cut corresponding to a new state law shortening the working week.
 * 1923 – Troops from France and Belgium invaded the Ruhr to force the Weimar Republic to pay reparations in the aftermath of World War I.
 * 1927 – Louis B. Mayer, head of Metro-Goldwyn-Mayer, hosted 36 people involved in the film industry at a banquet, where he announced the creation of what would become the Academy of Motion Picture Arts and Sciences.
 * 1943 – Italian-American journalist and trade-union activist Carlo Tresca, a leading public opponent of the Mafia infiltration of unions, was assassinated in New York City.
 * 1946 – The People's Republic of Albania was proclaimed, with Enver Hoxha as the country's de facto head of state.
 * 1961 – Students at the University of Georgia rioted in an attempt to prevent two African American students from attending the school.
 * 1986 – The Gateway Bridge in Brisbane, Australia, opened as the largest prestressed-concrete, single-box bridge in the world.
 * 2013 – French special forces failed in an attempted rescue of a DGSE agent, who had been taken hostage in 2009 by al-Shabaab, in Bulo Marer, Somalia.
 * Born/died: |Domenico Ghirlandaio |d|1494| Nicolas Steno |b|1638| Vincenzo Borg |b|1777| Bayard Taylor |b|1825| John Molson |d|1836| Alice Paul |b|1885|  Peter Badcoe |b|1934 | Roberta Fulbright |d|1953| Emile Heskey |b|1978| Tom Parry Jones |d|2013