Pope Sixtus I was the bishop of Rome from c. 115 to his death. He succeeded Alexander I and was in turn succeeded by Telesphorus.
According to the Liberian Catalogue of popes, he served the Church during the reign of Hadrian “from the consulate of Niger and Apronianus until that of Verus III and Ambibulus”, that is, from 117 to 126.
Like most of his predecessors, Sixtus I was believed to have been buried near Peter’s grave on Vatican Hill, although there are differing traditions concerning where his body lies today.
Pope Sixtus I instituted several Catholic liturgical and administrative traditions. According to the Liber Pontificalis (ed. Duchesne, I.128), he passed the following three ordinances:
That none but sacred ministers are allowed to touch the sacred vessels;
That bishops who have been summoned to the Holy See shall, upon their return, not be received by their diocese except on presenting Apostolic letters;
That after the Preface in the Mass, the priest shall recite the Sanctus with the people
Sources:
https://en.wikipedia.org/wiki/Pope_Sixtus_I
George L. Williams (2004). Papal Genealogy: The Families and Descendants of the Popes. p. 9. ISBN 9780786420711.
"Pope St. Sixtus I". The Catholic Encyclopedia. Vol. 14. New York: Robert Appleton Company. 1912.
