Pierio alikuwa padri ambaye inawezekana alikuwa mkuu wa Chuo cha Aleksandria kabla ya Achilas wa Aleksandria. Alistawi wakati Theonas alikuwa patriarki wa Alexandria. Alifariki Roma baada ya mwaka 309 Tangu kale anaheshimiwa kama mtakatifu, ingawa si rahisi kwamba alifia dini yake walivyosema Fosyo na wengine. Sikukuu yake huadhimishwa tarehe 4 Novemba au 29 Novemba. Sehemu chache tu za maandishi yake zimetufikia. Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko Mababu wa Kanisa Jerome, de Viris Illustribus 76. Online in the NPNF translation at CCEL.org. Accessed 31 January 2010. St. Jerome assures us that he survived the Diocletianic Persecution and spent the rest of his life at Rome. https://dacb.org/stories/egypt/pierius/ Martyrologium Romanum Reliquiæ Sacræ, III, 423-35 Patrologia Graeca, X, 241-6 Texte und Untersuchungen zur Geschichte der altchristlichen Literatur, V, ii (Leipzig, 1888), 165-184. For an English translation see Stewart Dingwall Fordyce Salmond in Ante-Nicene Fathers (New York, 1896), 157. Radford, Three Teachers of Alexandria (Cambridge, 1908); Bardenhewer, Gesch. der altchrist.