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Events
By place
Greece
★
Sparta calls and hosts a conference of the
Peloponnesian League. The conference is attended by Athenian representatives as well as members of the League. Following arguments by
Corinth against
Athens, a majority of the League members vote to declare that the Athenians had broken the peace.
★ The Athenian admiral,
Phormio, continues the siege of
Potidaea by blocking the entrance to the Gulf of Corinth. Meanwhile an Athenian fleet, led by
Archestratus, sails for Potidaea. However, instead of attacking Potidaea, they attack the
Macedonians under
Perdiccas II, who have allied with the Potidaeans. The Athenians capture
Therma (modern
Thessalonica) and then go on to besiege
Pydna. However, as the Athenians are besieging Pydna, they receive news that
Corinth has sent a force under the command of
Aristeus to support Potidaea. In response, Athens sends more troops and ships under the command of
Hipponicus. The combined Athenian force sails to Potidaea and lands there. In the ensuing
Battle of Potidaea, the Athenians are victorious against Corinth and its allies.
Italy
★ The
Greek colony of
Heraclea in Southern Italy is founded by colonists from
Tarentum and
Thurii.
By topic
Astronomy
★
Meton of Athens, a Greek mathematician and astronomer, calculates accurately the comparative chronology of the solar and lunar cycles. As a result, he introduces the 19-year
Metonic cycle into the Athenian
calendar as a method of calculating dates. Working with
Euctemon, he observes the summer
solstice on
27 June.
Architecture
★
Pheidias completes the sculptures that form the decoration of the
Parthenon in
Athens.
Births
★
Dionysius,
tyrant of
Syracuse (d.
367 BC) (approximate birth date)
Deaths
★