History of the Peloponnesian War

The first Lacedaemonian embassy was to order the Athenians to drive out the curse of the goddess; the history of which is as follows.

In former generations there was an Athenian of the name of Cylon, a victor at the Olympic games, of good birth and powerful position, who had married a daughter of Theagenes, a Megarian, at that time tyrant of Megara.

Now this Cylon was inquiring at Delphi; when he was told by the god to seize the Acropolis of Athens on the grand festival of Zeus.

Accordingly, procuring a force from Theagenes and persuading his friends to join him, when the Olympic festival in Peloponnese came, he seized the Acropolis, with the intention of making himself tyrant, thinking that this was the grand festival of Zeus, and also an occasion appropriate for a victor at the Olympic games.