 Peter of Spain (thirteenth century), exact identity unknown, was the author of a standard textbook on logic, the Tractatus  (Tracts),[1]  which enjoyed a high renown in Europe for many centuries. His works on logic are typical examples of the type of manuals that gradually started to emerge within the context of twelfth- and thirteenth-century teaching practices. Until recently he was also identified as the author of a number of extant works on medicine. 