Wikipedia:Selected anniversaries/June 15
- 1215 - King John of England (pictured) put his seal to Magna Carta.
- 1667 - Dr. Jean-Baptiste Denys administered the first fully-documented human blood transfusion, giving the blood of a sheep to a 15-year old boy.
- 1978 - King Hussein of Jordan married American Lisa Halaby, who takes the name Queen Noor.
- 1996 - The Provisional Irish Republican Army detonated a bomb in the commercial centre of Manchester, England, injuring over 200 people and causing widespread damage to buildings.