Wikipedia:Selected anniversaries/March 15
- 44 BCE - Julius Caesar of the Roman Republic was stabbed to death by Marcus Junius Brutus and several other Roman senators on the Ides of March.
- 1493 - Christopher Columbus returned to Spain after his first trip to the Americas.
- 1877 - History of cricket: Cricketers representing England and Australia played the first Test match at the Melbourne Cricket Ground.
- 1906 - Charles Rolls and Henry Royce founded the automobile manufacturing company Rolls-Royce.
- 1917 - Tsar Nicholas II of Russia was forced to abdicate in the February Revolution, ending three centuries of Romanov rule.