Wikipedia:Selected anniversaries/June 15
June 15: Corpus Christi in Roman Catholicism and Anglo-Catholicism
- 1215 - King John (pictured) of England put his seal to Magna Carta.
- 1389 - In the Battle of Kosovo, Turks defeated Serbs and Bosnians.
- 1752 - Benjamin Franklin conducted an experiment to prove that lightning is electricity by flying a kite in a thunderstorm.
- 1904 - The General Slocum burned in New York's East River, killing over 1,000 people.
- 1954 - The Union of European Football Associations was founded in Basel, Switzerland.