Manuscripts containing Greek medical texts were inventoried at the beginning of the 20th century by a group of philologists directed by Hermann Diels. However, Diels' catalogue omitted authors and works, and misidentified manuscripts and, furthermore, since the publication of the catalogue, some libraries have adopted a new system of classification, manuscripts have been destroyed and new ones have come to light. The present census is a checklist of the Greek medical manuscripts currently known in collections worldwide. It is both an amended and updated index of Diels' catalogue, and although it does not supersede Diels' catalogue, it will be the essential reference for years to come.
