- 326: Saint Helen discovered the Holy Cross in Jerusalem.
- 1810: Lord Byron swam across the Hellespont in 1 hour 10 minutes.
- 1837: Foundation of the University of Athens.
- 1993: Greek-American Steven John Lalas was arrested by US authorities on charges of spying on behalf of Greece.
- 2004: Nikos Magitsis became the first Greek to climb Mt. Everest.
- Births: Constantine III, Byzantine emperor (612), Marika Kotopouli, stage actress (1887), Georges Moustaki, composer (1934).
- Deaths: Mehmed II, Sultan who sacked Constantinople (1481); Thanassis Veggos (2011), actor
