POPE #7
Pope St. Sixtus I
The Roman Shepherd Known in Ancient Sources as Xystus
Ancient Succession, Sparse Biography
St. Sixtus I, called Xystus in the oldest records, succeeded St. Alexander I during the reign of Emperor Hadrian. Ancient chronologies disagree on the exact years, but they consistently assign him roughly a decade as Bishop of Rome.
Later sources attach several liturgical and disciplinary decrees to his name. Those traditions illuminate what later Christians associated with good Roman order, but they are not contemporary proof that Sixtus personally introduced the Sanctus or issued the regulations attributed to him.
“Holy, holy, holy, the Lord God of hosts, all the earth is full of his glory.”
Explore Pope St. Sixtus I
Historical Reading Note
Sixtus’s succession and approximate ten-year episcopate are supported by ancient catalogues and Eusebius. His Roman origin belongs to the received lists. His liturgical legislation, martyrdom, precise burial, and later relic histories come from later tradition and should be labeled accordingly.
Quick Facts
Overview
Sixtus I belongs to the generation in which the Roman Church continued to develop stable patterns of leadership, worship, and communion without legal security or public institutional power. His personal life remains obscure, but his name is embedded in the early episcopal succession preserved by Irenaeus and Eusebius.
His biography is best built around what the sources actually permit: a Roman origin, a roughly ten-year episcopate under Hadrian, a place between Alexander and Telesphorus, and later traditions concerning worship and discipline.
Sixtus or Xystus?
The oldest documents use the Greek form Xystus for the first three popes conventionally called Sixtus. The Latin form Sixtus later became standard.
This can create two common confusions. First, the name should not automatically be explained as the Latin word for “sixth,” even though Sixtus was the sixth successor after Peter. Second, the Xystus named in the Roman Canon is St. Sixtus II, the third-century martyr, not Sixtus I.
Chronology and Succession
The Holy See lists AD 117 or 119 to 126 or 128. The Liberian Catalogue gives consular dates equivalent to 117-126, while Eusebius’s works produce slightly different reconstructions. The sources nevertheless agree on a tenure of about ten years.
Sixtus succeeded Alexander and was followed by Telesphorus. In Irenaeus’s argument, this succession helped demonstrate that the Roman Church’s faith was publicly handed down rather than derived from a secret school.
The Church under Hadrian
Hadrian ruled a vast empire and is remembered for administration, travel, monumental building, and the consolidation of imperial frontiers. His reign also included the Bar Kokhba revolt and the refounding of Jerusalem as Aelia Capitolina.
For Christians, the age was neither simple peace nor constant universal persecution. Local accusation and hostility remained dangerous. At the same time, apologists such as Quadratus and Aristides addressed public defenses of Christianity to imperial authority, showing a Church increasingly willing to explain its faith in the intellectual language of the wider world.
Easter Practice and Communion
A letter of Irenaeus preserved by Eusebius names Xystus among the Roman bishops who did not follow the Asian practice of observing Pascha on the fourteenth day of the Jewish month regardless of the weekday. The Roman custom centered the celebration upon the Lord’s Day.
More importantly, these bishops remained in communion with Christians who followed the other ancient practice. They even exchanged the Eucharist as a sign of peace. This witness should not be turned into a claim that Sixtus settled the later Easter controversy by decree. It shows legitimate diversity existing within communion before the dispute became more severe.
The Three Attributed Decrees
The Liber Pontificalis attributes three measures to Sixtus: restricting the handling of sacred vessels to sacred ministers, requiring returning bishops to present apostolic letters, and directing that the Sanctus be sung after the Preface.
These claims appear centuries after Sixtus. They reflect real Catholic concerns – reverence for the Eucharist, authenticated communion among bishops, and ordered liturgical prayer – but cannot be treated as verbatim legislation from his reign.
The Sanctus itself is rooted in Isaiah’s vision and belongs to ancient Jewish and Christian worship. Sixtus may have served during a period of liturgical consolidation, but the evidence does not establish that he originated the acclamation.
Death and Martyrdom Tradition
Later catalogues and martyrologies call Sixtus a martyr and place his burial near St. Peter on Vatican Hill. No early passion or contemporary account describes his death.
His sanctity and ancient veneration are not in doubt, but the manner of death should remain qualified as tradition. Competing later claims concerning the location of his relics likewise cannot establish his original burial with certainty.
Why Pope St. Sixtus I Matters
Sixtus represents the quiet authority of continuity. His surviving historical footprint is small, yet the Roman succession remained visible, the Eucharist remained central, and communion could embrace differences of inherited discipline.
His page also teaches an important method: later tradition can preserve authentic Catholic instincts without providing a stenographic record of one pope’s decrees. Reverence and historical care belong together.
Prayer through the Intercession of St. Sixtus I
O God, who dost gather Thy Church in one faith and one Eucharistic communion, grant us reverence in worship, charity amid legitimate differences, and fidelity to the apostolic tradition. Through the intercession of St. Sixtus I, keep Thy people steadfast in truth and peace. Amen.
Sources and Further Study
- St. Irenaeus of Lyons, Against Heresies, III.3.3.
- Eusebius of Caesarea, Ecclesiastical History, IV.4-5 and V.24.
- The Holy See, official list of Supreme Pontiffs.
- The Liberian Catalogue, used for comparative chronology.
- Liber Pontificalis, used cautiously for later liturgical traditions.
Related Catholic Encyclopedia Entry
Timeline
Sixtus, known in early sources as Xystus, succeeds St. Alexander I.
His pontificate falls within the reign of Emperor Hadrian.
Ancient chronologies place Sixtus near the completion of a roughly ten-year episcopate.
Sixtus dies and St. Telesphorus succeeds him.
Traditional feast of St. Sixtus I.