Rudolf Virchow Sämtliche Werke. Herausgegeben von Christian Andree. 71 vols. anticipated.

From the number of volumes planned we may conclude that Virchow was one of the most prolific of all physicians. According to the Wikipedia article on Christian Andree, to which I have linked, volumes in this set were published by Peter Lang from 1992 to 1997, by Blackwell from 1999 to 2001, by Langen Müller in 2002, by Königshausen & Neuman in 2002, by Blackwell in 2003, and by Olms from 2005 to 2015. An Olms brochure which was available online when I wrote this entry in January 2020 indicated that Vols.1-29 would concern Medicine, Vols. 30-41 Politics, Vols. 42-58 Anthropology including Prehistory, Vols. 55 to 71 letters between Virchow and his contemporaries. In January 2020 it appeared that most, but not all, of the planned volumes were published.