Pope Sixtus I

 was the pope in the Catholic Church.

Papacy
The Holy See's Annuario Pontificio (2012) identifies him as a Roman who served from 117 or 119 to 126 or 128. According to the Liberian Catalogue of popes, he served the Church during the reign of Hadrian "a consulatu Negro et Aproniani usque Vero III et Ambibulo", that is, from 117 to 126. Eusebius states in his Chronicon that Sixtus I was pope from 114 to 124, while his Historia Ecclesiastica, using a different catalogue of popes, claims his rule from 114 to 128. All authorities agree that he reigned about ten years.