Callias of Chalcis

Callias of Chalcis, son of Mnesarchus, together with his brother Taurosthenes, succeeded his father as tyrants of Chalcis. Callias formed an alliance with Philip of Macedon against Plutarch, tyrant of Eretria, with the view of extending his authority over the whole of Euboea, a design which, according to Aeschines, he disguised as a plan for uniting in one league the states of the island and establishing a general Euboean congress based at Chalcis.