May 11 is the 131st (one hundred and thirty-first) day of the year in the Gregorian calendar and the 132nd in leap years. There are 234 days left to end the year.
330: The city of Byzantium is renamed Nova Roma during a "dedication ceremony", however it continues to be known more popularly as Constantinople.
868: In China, Wang Jie prints the Diamond Sutra (Buddhist text), translated from the Sanskrit language. It is considered the first printed book that has reached the present day.
912: In Byzantium, Alexander becomes emperor.
1310: in France, 54 Templars are burned by the Inquisition, accused of heresy.
1678: on the Dutch island of Curaçao, French ships under the command of Jean d'Estrées are shipwrecked while attempting to conquer it.
1745: in the Fontenoy plain, 7 kilometers southeast of the village of Tournai, during the War of the Austrian Succession, French forces defeat the Anglo-Dutch army at the Battle of Fontenoy.
1812: in the offices of the House of Lords (London) a certain John Bellingham assassinates British Prime Minister Spencer Perceval.
1813: in Argentina, the Assembly of the XIII year approves the creation of the National Anthem.
1820: HMS Beagle is launched in England, a ship that, a decade later, will take Charles Darwin on his scientific voyage.
1850: in Naples (Italy), the astronomer Anníbale de Gasparis (1819-1892) discovers the asteroid Parthenope (11).
1857: in Delhi (India) ―in the framework of the 1857 Rebellion―, the Indians liberate the city.
1858: Minnesota is admitted as the 32nd state of the United States.
1867: Luxembourg becomes independent from Belgium and the Netherlands.
1880: 11 km northwest of the town of Hanford (California), several civilian police officers from the Southern Pacific Railroad company kill seven residents who refused to sell their land for the railroad to pass through. (See Mussel Slough Tragedy.)
1891: in Otsu (Japan), Tsarevich Nicholas Alexandrovich (later Nicholas II) is attacked by a Japanese member of his escort, who is captured. See Ōtsu Incident.
1911: off the coast of Cape Charles (Virginia, United States) the passenger ship USS Merida collides with the warship USS Farragut.
1918: in Vladikavkaz (North Ossetia) the Republic of the Mountains of the North Caucasus is established. In June 1920 it will be eliminated by the Red Army.
1924: Mercedes-Benz formed by Gottlieb Daimler and Karl Benz is created in Germany as a merger of the two companies.
1927 – The Academy of Motion Picture Arts and Sciences is created in Los Angeles, California.
1931: in the Second Spanish Republic in Madrid a burning of churches and convents begins.
1939 – The Battle of Khalkhin Gol begins between Red Army forces and Japanese troops.
1940: Münchengladbach is the first German city bombed in World War II by 35 Hampden and Whitley planes, killing 4 civilians.
1943: in Changshiao (Hunan province) the Japanese Expeditionary Army under the command of General Shunroku Hata perpetrate the third day (of four) of the Changshiao Massacre, in which 30,000 men, women and children were raped and killed.
1943: in the Aleutian Islands -in the framework of World War II- US troops invade Attu Island from Japanese troops.
1944 Allied troops begin the largest offensive of World War II on the Gustav Line.
1946: UMNO (United Malays National Organization) is founded in Malaysia, the largest political party in the country.
1949: Siam changes its name to Thailand for the second time. That name was imposed in 1939 but was changed in 1945.
1949: Israel joins the UN.
1958: on the Bikini Atoll (Marshall Islands, in the middle of the Pacific Ocean), the United States detonates its bomb