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Technology Overview History
A quart of wheat for a denarius, and three quarts of barley for a denarius; and do not harm the oil and the wine.
- Revelations, 6:6

Coinage is the second Commerce Commerce Research available at the Library. It is preceded by Barter and is required to research the third Commerce Commerce technology, Trade.

Researching Coinage further increases the Commerce Limit Commerce Limit of all resources (except Knowledge Knowledge) by +50 and the Climit Caravan Limit by +1. It also enables the trading of resources at the Market and the colonization of new continents.