Alea iacta est: the Latin phrase 'the die has been cast' — meaning and history Alea iacta est Latin phrase attributed to Julius Caesar during the 49 BC crossing of the Rubicon; signifies an irreversible decision. Overview, origins, linguistic notes, and modern uses.
Caesar's Comet (Comet C/-43 K1) Caesar's Comet Bright non‑periodic comet observed in 44 BC and widely read by Romans as a sign of Julius Caesar's deification; notable for exceptional brightness and a parabolic orbit.