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The Gnomon Bibliographic Database (GBD) contains bibliographic data on the journal articles, monographs, book chapters, conference papers and other materials appearing in Gnomon, the German review journal covering classical antiquity. One of GBD's main features is its thesaurus of names, places, themes, and other terms associated with the ancient world. This thesaurus is organized hierarchically, with major entries for philosophy, epigraphy, topography, history, and more. Available in German or English.
Also available as a supplement to GBD is Gnomon Online - The Eichstätt Information System for Classical Studies. Available in German, French or English.