Online Coins of the Roman Empire (OCRE) is a corpus of coin types from the Roman Empire, from Augustus (27 B.C.) to Zeno (A.D. 491). A joint project of the American Numismatic Society and the Institute for the Study of the Ancient World, OCRE is designed to help in the identification, cataloging, and research of the rich and varied coinage of the Roman Empire. The project will ultimately record every published type of Roman Imperial Coinage from Augustus in 31 BC, until the death of Zeno in AD 491. This will create an easy to use digital corpus, with downloadable catalog entries, incorporating almost 50,000 types of coins. To date, about 20,000 coin types are described, from 30 BC until AD 238, effectively covering the entire High Empire until the Crisis of the Third Century.