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Cylon, one of the Athenian nobles and a previous victor of the "Olympic Games, attempted a "coup in 632 BC with support from "Megara, where his father-in-law, "Theagenes, was "tyrant. The "oracle at "Delphi had advised him to seize Athens during a festival of "Zeus, which Cylon understood to mean the Olympics. However, the coup was opposed, and Cylon and his supporters took refuge in "Athena's temple on the "Acropolis. Cylon and his brother escaped, but his followers were cornered by Athens' nine "archons. According to "Plutarch and "Thucydides (1.126), they were persuaded by the archons to leave the temple and stand trial after being assured that their lives would be spared.
In an effort to ensure their safety, the accused tied a rope to the temple's statue and went to the trial. On the way, the rope (again, according to Plutarch) broke of its own accord. The Athenian archons, led by "Megacles, took this as the goddess's repudiation of her suppliants and proceeded to stone them to death (on the other hand, "Herodotus, 5.71, and Thucydides, 1.126, do not mention this aspect of the story, stating that Cylon's followers were simply killed after being convinced that they would not be harmed). Most likely, the story found in Plutarch is a later invention.
Megacles and his "genos, the "Alcmaeonidae, were exiled from the city for violating the laws against killing suppliants. The Alcmaeonidae were cursed with a "miasma ("stain" or "pollution"), which was inherited by later generations, even after the genos retook control of Athens.
In April 2016, two mass graves containing 80 bodies, some shackled, were found in "Palaio Faliro, a suburb of Athens. The skeletons date from the second quarter of the seventh century BC, and it has been suggested that they were the supporters of Cylon killed in the aftermath of his attempted coup.