CACrown ArchivesThe cinema collection
Menu
Research dossier · General Reference

Nicholas IV of Constantinople

Patriarch of Constantinople

Cross-disciplinary reference desk with index cards, atlas, dictionary and catalogue
General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionAug 25, 2026
Entity authorityQ3038419 ↗
Source-derived summary

Nicholas IV of Constantinople (Mouzalon Greek: Νικόλαος Μουζάλων; c. 1070 – 1152) was the Ecumenical Patriarch of Constantinople from December 1147 to March/April 1151.

Nicholas was born in c. 1070 and probably began his career teaching the gospels. Emperor Alexios I Komnenos (r. 1081–1118) appointed him as archbishop of Cyprus, but Nicholas abdicated the see in c. 1110. He spent the next 37 years in the Monastery of Saints Cosmas and Damian in the Kosmidion suburb of Constantinople.

He was elected to the patriarchal throne in 1147, replacing Patriarch Cosmas II of Constantinople, who was accused of Bogomilism. His election however caused considerable controversy: its canonical validity was called in question since he had voluntarily resigned from his previous see. Eventually, Nicholas IV was forced to resign as patriarch and died in 1152.

He wrote a number of theological works, amongst them a treatise refuting the Filioque addressed to Alexios I, and a vivid poetic defence of his first abdication.

Notes and references

Bibliography

Kazhdan, Alexander, ed.

Editorial summary

“Nicholas IV of Constantinople” enters the record as patriarch of Constantinople. Crown Archives preserves that source wording while asking what Nicholas, Constantinople and Patriarch can confirm, complicate or overturn.

Editorial reviewA concise reference frame for defining the subject, testing terminology and identifying the institution closest to the evidence. The current lead gives the account dated anchors—1070, 1152, 1147, 1151—that can be checked directly. The linked authority record independently contributes the date 1070-01-01. Its strongest next move is a source search built around Nicholas, Constantinople and Patriarch.
Editorial analysis

Why this record matters

“Nicholas IV of Constantinople” is worth following because a concise public description often conceals a longer documentary argument. Here, Nicholas, Constantinople and Patriarch provides the most credible route into that argument.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Aug 25, 2026. The linked authority identifier is Q3038419. VIAF identifies the subject as 89709283. The Library of Congress control number is n79012575. 2 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1070, 1152, 1147 and 1151.

Critical limits

The absence of detail may reflect summary conventions rather than a lack of surviving documentation. 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.

Best used for
  • Subject orientation
  • Search vocabulary
  • Locating named sources
Verify next

The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “Nicholas IV of Constantinople”, its source revision and the description used here.
  2. Expand the search: follow Nicholas IV of Constantinople primary sources, Nicholas IV of Constantinople archive and Nicholas research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Nicholas IV of Constantinople”?
  2. Which cited source is closest to the event, object or claim?
  3. Which institution is responsible for the underlying evidence?
Subject index

Search terms from this dossier

Source & attribution

This entry incorporates text from “Nicholas IV of Constantinople” 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.