Pope Sylvester I
33rd pope and saint (reigned 314-335)

Pope Sylvester I (also Silvester, before 284 – 31 December 335) was the bishop of Rome from 31 January 314 until his death on 31 December 335. He filled the See of Rome at an important era in the history of the Western Church, though very little is known of his life.
During his pontificate, he notably convened the Council of Arles in 314, which condemned the separatist Donatist sect, and the First Council of Nicaea in 325, which aimed to resolve the Arian controversy.
Sylvester I's pontificate coincided with the construction of churches including Old St. Peter's Basilica, the Basilica of the Holy Cross in Jerusalem (Santa Croce in Gerusalemme), as well as the Archbasilica of Saint John Lateran. His feast is celebrated as Saint Sylvester's Day, on 31 December in Western Christianity, and on 2 January in Eastern Christianity.
Personal biography
The accounts of his pontificate preserved in the seventh- or eighth-century Liber Pontificalis contain little more than a record of the gifts said to have been conferred on the church by Constantine I, although it does say that he was the son of a Roman named Rufinus.
Pontificate
Large churches were founded and built during Sylvester I's pontificate, including Basilica of St. John Lateran, Basilica of the Holy Cross in Jerusalem, Old St. Peter's Basilica and several churches built over the graves of martyrs.
Begin with the source’s own compact description: “Pope Sylvester I” is 33rd pope and saint (reigned 314-335). The dossier treats that line as a proposition to test through Pope, Sylvester and 33rd, not as a finished interpretation.
Why this record matters
The phrase “33rd pope and saint (reigned 314-335)” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 28, 2026. The linked authority identifier is Q47149.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Pope Sylvester I”, its source revision and the description used here.
- Expand the search: follow Pope Sylvester I primary sources, Pope Sylvester I archive and Pope research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Pope Sylvester I”?
- Which institution is responsible for the underlying evidence?
- Which cited source is closest to the event, object or claim?
Search terms from this dossier
This entry incorporates text from “Pope Sylvester I” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.