In ancient Athens, a broken piece of pottery could become a ballot. Citizens scratched the name of a person they wanted sent away onto a shard called an ostrakon; the plural, ostraka, gave us the word “ostracism.” It was a way to remove someone seen as a danger to the city without accusing them of a crime.
The Athenians did not hold this vote automatically. They first decided whether to conduct an ostracism that year. If they did, citizens gathered to submit their inscribed shards. Pottery was an everyday material, so an ordinary fragment could serve a surprisingly consequential purpose: carrying one person’s choice into a citywide count.
If enough people took part, the citizen whose name appeared most often had to leave Athens for ten years. Historians generally interpret the required 6,000 votes as a minimum turnout, though ancient accounts leave room for debate. Ostracism was not the same as a criminal conviction: the person could keep their property and return after the exile ended.
The surviving shards make the practice tangible. One pottery ballot held by the Canellopoulos Museum names Themistocles, a prominent Athenian general. He was among the figures ostracized as political rivalries grew sharper. Other recovered ostraka bear names, insults, and even small drawings—a reminder that the voters behind this formal procedure had personal opinions, too.
Ostracism was meant to protect Athenian democracy from anyone becoming too powerful, but it could also be used in political disputes. That tension makes the custom more than a strange fact about ancient voting. As the Foundation of the Hellenic World’s account shows, these humble scraps of clay preserve traces of a difficult question: how should a community respond when it fears one of its own citizens?