Agoranomoi, overseers of the market, an office known in many Greek states. In Athens there were ten, five for the city and five for the Piraeus. They kept order in the market, saw to the quality of goods, and collected market dues (Ath. pol. 51. 1); but at Athens there were separate measures magistrates (metronomoi) responsible for weights and measures, and magistrates responsible for the corn trade. They could inflict penalties for minor offences; for more serious offences they initiated prosecutions before a jury-court and presided at the trial. In the post-Classical age they played an important part in ensuring the civic food supply, and might subsidize its cost themselves (see euergetism; liturgy).