Pope Lucius I dies. Elected during the persecution of Christians under Emperor Trebonianus Gallus, Lucius I had to flee Rome almost immediately after becoming pope.
When Valerian replaced Gallus, Pope Lucius I was able to return. A letter written to Lucius by Cyprian suggests that he was fairly tolerant towards lapsed Christians — those Christians who renounced their faith in some way during official persecutions.
Many Christians, though, didn't approve of such tolerance and leniency. This led to the rise of one of the earliest antipopes, Novatian, and towards him Pope Lucius I showed no tolerance.