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The primary database of record for identifying scholarly work on ancient Greece and Rome, from 1924 to the present.

The most complete and most authoritative modern encyclopedia of the classical world. In nearly 20,000 entries it covers two thousand years of history and culture of ancient Greece and Rome, and their reception in the two thousand years that followed. Articles are available in both English and the original German.

Originally conceived as an open-access collection of materials for the study of ancient Greece and Rome, including texts (in both the original language and English translations), dictionaries and other reference works (mostly older out-of-copyright works), images, and other studies. More recent modules have expanded coverage to Renaissance Latin poetry.