May 22

• May 22, 337
  Emperor of Rome Constantine dies in villa Achyron near Nicomedia, so three his sons Constantine II, Constantius II and Constans, succeed
• May 22, 1200
  Philip II of France recognizes John's possession of the continental Angevin lands at the peace treaty of Le Goulet
• May 22, 1246
  Henry Raspe, promoted by Archbishop of Cologne Konrad von Hochstaden, is elected antiking in opposition to Conrad IV of Germany by the Rhenish prelates in France
• May 22, 1370
  Jews are massacred and expelled from Brussels, Belgium
• May 22, 1455
  King Henry VI is taken prisoner by the Yorkists, a cadet branch of the English royal House of Plantagenet, at the Battle of St. Albans, the first battle in the 30-year War of the Roses
• May 22, 1526
  Pope Clement VII, France, Genoa, Venice, Florence and Milan form League of Cognac against Emperor Charles V
• May 22, 1712
  Emperor Charles VI is crowned king of Hungary
• May 22, 1762
  Trevi Fountain, one of the most famous fountains in the world, completed by Italian sculptor Pietro Bracci, is officially inaugurated by Pope Clement XIII
• May 22, 1843
  The first wagon train with over 1,000 settlers and 1,000 head of cattle sets out from Missouri down the Oregon Trail, an east-west wheeled wagon route and emigrant trail connected the Missouri River to valleys in Oregon
• May 22, 1860
  In Lebanon a small group of Maronites fire on a group of Druzes at the entrance to Beirut, killing one and wounding two, which sparks off a torrent of violence which swept through Lebanon
• May 22, 1888
  Leroy Buffington, an architect from Minnesota, patents a system to build skyscrapers using load-bearing iron frames
• May 22, 1939
  At the Reich Chancellory in Berlin, Italian Foreign Minister Count Ciano and German Foreign Minister Joachim von Ribbentrop sign a ten-year political and military alliance, dubbed the Pact of Steel
• May 22, 1943
  Stalin disbands Communist International
• May 22, 1957
  South Africa Government approves race separation in universities
• May 22, 1960
  A 9.5-magnitude earthquake occurs off the coast of Chile, killing about 1700 and leaving 2 million homeless and becomes the largest earthquake recorded to date
• May 22, 1973
  At Xerox PARC, Bob Metcalfe invents the Ethernet computer connectivity system, taking the name "Ethernet" based on a discredited physical theory of an existing "ether" in space allowing transmission of light rays from the sun to the Earth
• May 22, 2001
  The Terraces of the Baha'i Faith, garden terraces around the Shrine of the Báb on Mount Carmel in Haifa, Israel officially open
• May 22, 2012
  Tokyo Skytree, the tallest self-supporting tower in the world at 634 metres high, is opened to the public
• May 22, 2014
  The Royal Thai Army overthrows the caretaker government of Niwatthamrong Boonsongpaisan after a failure to resolve the political unrest in Thailand