Events on May 16 40
Year 218
Julia Maesa, aunt of the assassinated Caracalla, is banished to her home in Syria by self-proclaimed emperor Macrinus. She declares her 14-year-old grandson Elagabalus to be emperor of Rome. Macrinus is later deposed.
Year 946
Emperor Suzaku abdicates the throne in favor of his brother Murakami who becomes the 62nd emperor of Japan.
Year 1204
Baldwin IX, Count of Flanders is crowned as the first Emperor of the Latin Empire.
Year 1527
The Florentines drive out the Medici for a second time and Florence re-establishes itself as a republic.
Year 1584
Santiago de Vera becomes sixth Governor-General of the Spanish colony of the Philippines.
Year 1770
A 14-year-old Marie Antoinette marries 15-year-old Louis-Auguste who later becomes king of France.
Year 1771
The Battle of Alamance, a pre-American Revolutionary War battle between local militia and a group of rebels called The "Regulators", occurs in present-day Alamance County, North Carolina.
Year 1811
Peninsular War: The allies Spain, Portugal and United Kingdom, defeat the French at the Battle of Albuera.
Year 1812
Russian Field Marshal Mikhail Kutuzov signs the Treaty of Bucharest, ending the Russo-Turkish War. Bessarabia is annexed by Imperial Russia.
Year 1834
The Battle of Asseiceira is fought, the last and decisive engagement of the Liberal Wars in Portugal.
Year 1843
The first major wagon train heading for the Pacific Northwest sets out on the Oregon Trail with one thousand pioneers from Elm Grove, Missouri.
Year 1868
United States President Andrew Johnson is acquitted in his impeachment trial by one vote in the United States Senate.
Year 1874
A flood on the Mill River in Massachusetts destroys much of four villages and kills 139 people.
Year 1888
Nikola Tesla delivers a lecture describing the equipment which will allow efficient generation and use of alternating currents to transmit electric power over long distances.
Year 1891
The International Electrotechnical Exhibition opens in Frankfurt, Germany, and will feature the world's first long distance transmission of high-power, three-phase electric current (the most common form today).
Year 1916
The United Kingdom of Great Britain and Ireland and the French Third Republic sign the secret wartime Sykes-Picot Agreement partitioning former Ottoman territories such as Iraq and Syria.
Year 1918
The Sedition Act of 1918 is passed by the U.S. Congress, making criticism of the government during wartime an imprisonable offense. It will be repealed less than two years later.
Year 1919
A naval Curtiss NC-4 aircraft commanded by Albert Cushing Read leaves Trepassey, Newfoundland, for Lisbon via the Azores on the first transatlantic flight.
Year 1951
The first regularly scheduled transatlantic flights begin between Idlewild Airport (now John F Kennedy International Airport) in New York City and Heathrow Airport in London, operated by El Al Israel Airlines.
Year 1960
Theodore Maiman operates the first optical laser (a ruby laser), at Hughes Research Laboratories in Malibu, California.
Year 1961
Park Chung-hee leads a coup d'état to overthrow the Second Republic of South Korea.
Year 1966
The Communist Party of China issues the "May 16 Notice", marking the beginning of the Cultural Revolution.
Year 1988
A report by the Surgeon General of the United States C. Everett Koop states that the addictive properties of nicotine are similar to those of heroin and cocaine.
Year 1991
Queen Elizabeth II of the United Kingdom addresses a joint session of the United States Congress. She is the first British monarch to address the U.S. Congress.
Year 2003
In Morocco, 33 civilians are killed and more than 100 people are injured in the Casablanca terrorist attacks.
Year 2011
STS-134 (ISS assembly flight ULF6), launched from the Kennedy Space Center on the 25th and final flight for Space Shuttle Endeavour.
Year 2014
Twelve people are killed in two explosions in the Gikomba market area of Nairobi, Kenya.