In 1545 he published his remarkable "Bibliotheca universalis" (ed. J. Simler 1574), supposedly a catalogue (in Latin, Greek and Hebrew) of all writers who had ever lived, with the titles of their works, etc. A second part, "Pandectarium sive partitionum universalium Conradi Gesneri Ligurini libri xxi", appeared in 1548; only nineteen books being then concluded. The last, a theological encyclopaedia, was published in 1549, but the last but one, intended to include his medical work, was never finished.