Cosmas and Damian
twins and early Christian martyrs born in Arabia

Cosmas and Damian (c. 3rd century – c. 287 or c. 303 AD) were two Arab physicians and early Christian martyrs. They practised their profession in the seaport of Aegeae, then in the Roman province of Cilicia.
Cosmas and Damian were third century Arabian-born twin brothers who embraced Christianity and practiced medicine and surgery without a fee. This led them to being named anargyroi (from the Greek Ἀνάργυροι, "the silverless" or "unmercenaries"); by this, they attracted many to the Christian faith. They reputedly cured blindness, fever, paralysis and reportedly expelled a serpent. They were arrested by Lysias, governor of Cilicia (modern-day Çukurova, Turkey) during the Diocletian persecution because of their faith and fame as healers. Emperor Diocletian, who favoured the worship of the Olympian gods, issued a series of edicts that condemned the Christians with the goal of eliminating Christianity from the Roman Empire.
Lives
Nothing is known of their lives except that they suffered martyrdom in Syria during the persecution of the Emperor Diocletian. According to Christian traditions, the twin brothers were born in Arabia and became skilled doctors. They healed through incubation, curing their patients miraculously in sleep.
Begin with the source’s own compact description: “Cosmas and Damian” is twins and early Christian martyrs born in Arabia. The dossier treats that line as a proposition to test through Cosmas, Damian and twins, not as a finished interpretation.
Why this record matters
The phrase “twins and early Christian martyrs born in Arabia” 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 21, 2026. The linked authority identifier is Q76486. VIAF identifies the subject as 242302940. The Library of Congress control number is no92011104. 1 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
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.
- 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 “Cosmas and Damian”, its source revision and the description used here.
- Expand the search: follow Cosmas and Damian primary sources, Cosmas and Damian archive and Cosmas 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 “Cosmas and Damian”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Cosmas and Damian” 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.