Papa Eleutero (kwa Kigiriki Ελευθέριος) alikuwa Papa kuanzia takriban 171/177 hadi kifo chake takriban 185/193. Alitokea Nikopoli, Ugiriki. Alimfuata Papa Soter akafuatwa na Papa Viktor I. Egesipo aliandika kwamba alikuwa shemasi wa Roma chini ya Papa Aniseti na Papa Soter. Chini yake uzushi ulienea na Eleutero aliandika kitabu kuupinga Tangu kale anaheshimiwa kama mtakatifu. Sikukuu yake huadhimishwa tarehe 26 Mei. Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko Orodha ya Mapapa https://www.vatican.va/content/vatican/en/holy-father.index.html#holy-father The Montanist movement, which originated in Asia Minor, made its way to Rome and Gaul in the second half of the 2nd century, during the reign of Eleuterus. Its nature did not diverge so much from the orthodoxy of the time for it to initially be labeled heresy. During the violent persecution at Lyon, in 177, local confessors wrote from their prison concerning the new movement to the Asiatic and Phrygian communities as well as to Pope Eleuterus. Cfr. Eusebius, Historia Ecclesiastica, 5.3.4; translated by G.A. Williamson, Eusebius: The History of the Church (Harmonsworth: Penguin, 1965), p. 206.