The Almansor, so named after the prince to whom it was addressed, was a popular textbook and one of the first general medical texts to be printed. Rhazes ranks with Hippocrates and Galen as one of the founders of clinical medicine. Six copies of this work are recorded by the ISTC: London: British Library (purchased by William Osler in 1915 and bequeathed by him); Munich: UB; Florence: Facoltà di Medicina, Padova: C; Washington, D. C.: Smithsonian Institution, Dibner Library; St. Petersburg, Russia:. Aka.  ISTC No. ir00181500. When Osler purchased his copy it was thought to be the only copy surviving. For its full collation see the Bibliotheca Osleriana, No. 451.

Salani de Negris, whose commentary on Rhazes is included in this edition, and whose name is cited in this spelling by the ISTC, appeared to be virtually unknown except for this edition when I attempted to identify him further in July 2020.