| | 363 - Roman Emperor Julian defeats the Sassanid army in the Battle of Ctesiphon, under the walls of the Sassanid capital, but is unable to take the city. |
| | 757 - Paul I succeeds Stephen II as pope. |
| | 1167 - Battle of Legnano, in which the Lombard League defeats Emperor Frederick I. |
| | 1414 - Council of Constance. |
| | 1453 - Ottoman armies under Sultan Mehmed II Fatih capture Constantinople after a siege, ending the Byzantine Empire and with it the Roman Empire. |
| | 1660 - English Restoration: Charles II (on his birthday - see below) is restored to the throne of Great Britain. |
| | 1677 - Treaty of Middle Plantation establishes peace between the Virginia colonists and the local Indians. |
| | 1727 - Peter II becomes Tsar of Russia. |
| | 1733 - Right of Canadians to keep Indian slaves upheld at Quebec City. |
| | 1765 - Patrick Henry in a speech denouncing the Stamp Act is said to have said, "If this be treason, make the most of it!" |
| | 1790 - Rhode Island becomes the last of the original United States colonies to ratify the Constitution and is admitted as the 13th U.S. state. |
| | 1848 - Wisconsin is admitted as the 30th U.S. state. |
| | 1864 - Emperor Maximilian of Mexico arrives in Mexico for the first time. |
| | 1867 - Austro-Hungarian agreement called Ausgleich ("the Compromise") is born through Act 12, which established the Austro-Hungarian Empire; on June 8 Emperor Francis Joseph was crowned King of Hungary. |
| | 1868 - The assassination of Michael Obrenovich III, Prince of Serbia, in Belgrade. |
| | 1886 - Chemist John Pemberton places his first advertisement for Coca-Cola, the ad appearing in the Atlanta Journal. |
| | 1886 - Putney Bridge opens in west London. |
| | 1903 - May coup d'etat: Alexander Obrenovich, King of Serbia, and Queen Draga, are assassinated in Belgrade by the Black Hand (Crna Ruka) organization. |
| | 1913 - Igor Stravinsky's ballet score The Rite of Spring is premiered in Paris. |
| | 1914 - Ocean liner Empress of Ireland sinks in the Gulf of St. Lawrence; 1,024 lives lost. |
| | 1919 - Einstein's theory of general relativity is tested (later confirmed) by Arthur Eddington's observation of a total solar eclipse in Principe and by Andrew Crommelin in Sobral, Ceará, Brazil.[1] |
| | 1932 - WW I Veterans begin to assemble in Washington, DC in the Bonus Army to request cash bonuses promised to them to be paid in 1945. |
| | 1935 - Construction of Hoover Dam is completed. |
| | 1950 - St. Roch, first ship to circumnavigate North America, arrives in Halifax, Nova Scotia . |
| | 1953 - Sir Edmund Hillary and Sherpa Tenzing Norgay are the first people to reach the summit of Mount Everest, on Tenzing Norgay's 39th birthday. |
| | 1968 - Manchester United wins the European Cup, the first English Club to do so. |
| | 1985 - Heysel Stadium disaster: In Brussels, Belgium, 39 football fans die and hundreds are injured during a riot at a European Cup match. |
| | 1985 - Amputee Steve Fonyo completes cross-Canada marathon at Victoria, British Columbia, after 14 months. |
| | 1990 - Boris Yeltsin elected President of Russia. |
| | 1994 - Herbert Shughart refuses to shake hands with U.S. President Bill Clinton following a presentation of posthumous Medals of Honor to the widows of two soldiers for valor at the Battle of Mogadishu. |
| | 1999 - Olusegun Obasanjo takes office as President of Nigeria, the first elected and civilian head of state in Nigeria after 16 years of military rule. |
| | 2004 - The World War II Memorial is dedicated in Washington, D.C. |
| | 2004 - The Al-Khobar massacres in Saudi Arabia kill 22. |
| | 2005 - France, one of the founders of a united Europe, resoundingly rejects the European Constitution, throwing the idea of a European Union into question and leaving the continent in a state of anxiety and uncertainty (see French referendum on the European Constitution). |