This chapter surveys the major developments in the economic history of the Greek world in the classical period (479–323 BCE). While agricultural practices and productive capacities did not change dramatically, this was a period characterized by a massive increase in the demand for certain commodities, especially timber for the ship-building and monumental-construction efforts of the period and grain to meet the dietary needs of a growing human population. It also considers the major developments in the supply and circulation of coinage in the classical period and the emergence of private banking and the expansion of credit, all of which facilitated both local and long-distance trade. As trade intensified throughout the Aegean and poleis developed more sophisticated institutions for local governance, they developed strategies to derive revenue from trade and imposed regulations on both the production and trade of commodities in which they had a special interest.