Books by Pope John XXI:
Books in the extended shelves:
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John XXI, Pope, -1277: Die Ophthalmologie (Liber de oculo) des Petrus Hispanus (Petrus von Lissabon, später papst Johannes XXI.) : Nach münchener, florentiner, pariser, römer lateinischen codices, zum ersten male herausgegeben (J.F. Lehmann, 1899), also by Albrecht Maria Berger (page images at HathiTrust)- John XXI, Pope, -1277: Expositio super Summulis Petri Hispani. (Nicolaus Wolf, 1500), also by Pierre Tartaret (page images at HathiTrust)
- John XXI, Pope, -1277: Expositio super textu Petri Hispani. (Albertinus Vercellensis, 1500), also by Nicolas d'Orbelles (page images at HathiTrust)
- John XXI, Pope, -1277: Logica memoratiua : chartiludiũ logice, siue, totius dialectice memoria : & nouus Petri Hyspani textus emendatus : cum iucundo pictasmatis exercitio (Industrius vir Ioãnes Gruninger impressit, 1509), also by Thomas Murner (page images at HathiTrust)
- John XXI, Pope, -1277: Thesaurus pauperum. English ([Imprynted at London : In Fletestreate at the sygne of the Rosegarland by Wyllyam Coplande, [not before 23 Aug. 1553]]), also by Humphrey Llwyd, of Carystus. Epistola de secunda valetudine tuenda. English Diocles, and Hippocrates (HTML at EEBO TCP)
- John XXI, Pope, -1277: The treasurie of health contayning many profitable medicines, gathered out of Hipocrates, Galen and Auicen / by one Petrus Hyspanus, and translated into English by Humfry Lloyd, who hath added thereunto the causes and signes of euery disease, with the Aphorismes of Hipocrates, and Iacobus de Partibus, redacted to a certaine order according to the members of mans bodie, and a compendious table containing the purging and confortative medicines, with the exposition of certaine names and weights in this booke contained, with an epistle of Diocles unto Kyng Antigonus.. ([London,: William Copland, ca. 1560]), also by Jacques Desparts, of Carystus Diocles, Hippocrates. Aphorisms. English, Humphrey Llwyd, and Pseudo-Mesuë (HTML at EEBO TCP)
Find more by Pope John XXI at your library, or elsewhere.