Suburbicarian Diocese of Velletri–Segni
suburbicarian diocese

The Suburbicarian Diocese of Velletri–Segni is one of the Latin suburbicarian dioceses, Catholic dioceses in Italy close to Rome with a special status and a cardinal bishop, the bishop of Velletri–Segni. Historically, the see of Velletri was combined with the see of Ostia from 1060 to 1914.
The cathedral in the city of Velletri is dedicated to Saint Clement.
Segni was a small town, a former Roman colony, sited approximately halfway between Rome and Montecassino. In the 12th century, the diocese possessed only seven castelli, 37 churches, 3 chapels, and 3 cloisters.
Separation of Ostia and Velletri
By the beginning of the 20th century, it had become apparent to the papacy that the suburbicarian bishops had become overburdened with the responsibilities of their curial and diocesan duties. The increase in commerce, in roads and travel, and the migration of people to the city, as well as the increased burden of duties in the papal administration because of the mass and complexity of problems affecting the Church, made some sort of relief necessary. Pope Pius X therefore issued a document, Apostolicae Romanorum Pontificium, granting the bishops of Ostia, Porto, Palestrina, and Frascati each a suffragan bishop to carry the burden of their pastoral duties in their dioceses. The diocese of Sabina and Velletri are stated to already have had a suffragan bishop, whose powers were in any case henceforth augmented and regulated by Apostolicae Romanorum Pontificium. The appointment of the suffragan bishops was reserved to the Pope.
This brief starts where responsible research should: with the source description of “Suburbicarian Diocese of Velletri–Segni” as suburbicarian diocese. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the general reference register because the source frames it as suburbicarian diocese. Its deeper value depends on whether names, dates, institutions and citations support that framing.
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 14, 2025. The linked authority identifier is Q877786. Authority coordinates are 41.667, 12.783. 4 of 5 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1060 and 1914.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. 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 “Suburbicarian Diocese of Velletri–Segni”, its source revision and the description used here.
- Expand the search: follow Suburbicarian Diocese of Velletri–Segni primary sources, Suburbicarian Diocese of Velletri–Segni archive and Suburbicarian 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 “Suburbicarian Diocese of Velletri–Segni”?
- What terminology or title could unlock a more precise catalogue search?
- Which cited source is closest to the event, object or claim?
Search terms from this dossier
This entry incorporates text from “Suburbicarian Diocese of Velletri–Segni” 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.