307 BC

307 BC was a year in the pre-Julian Roman calendar. In the Roman Republic, it was known as the Year of the Consulship of Caecus and Violentus (or, less frequently, year 447 Ab urbe condita).

Events

• Antigonus I Monophthalmus's son, Demetrius I Poliorcetes, lands in Attica with a large fleet. He declares Athens a free city and expels Demetrius of Phaleron, the governor who had been installed by Cassander. This marked the restoration of the Athenian democracy.
• Demetrius Poliorcetes defeats Ptolemy I Soter's fleet off Cyprus, capturing 40 of Ptolemy's ships.
• Antigonus I Monophthalmus and Demetrius I Poliorcetes assume the title of King of Macedon. Antigonus declares himself king, and Demetrius his co-ruler. Ptolemy I Soter, Seleucus I Nicator, Lysimachus, and Cassander soon follow suit, establishing themselves as independent rulers and thereby formally dissolving the empire of Alexander the Great and ushering in the Hellenistic period.
• Agathocles, tyrant of Syracuse, invades the territory of Bruttium in southern Italy.

Births

• Chrysippus, Greek Stoic philosopher (approximate date) (d. c. 206 BC)
• Qin Er Shi, Emperor of the Qin dynasty of China (d. 207 BC)

Deaths

• Alexander IV of Macedon, titular king of Macedon, son of Alexander the Great and Roxana, is assassinated by Cassander. Roxana is also assassinated.