Thirteen Treasures of the Island of Britain
Welsh mythical objects

The Thirteen Treasures of the Island of Britain (Welsh: Tri Thlws ar Ddeg Ynys Prydain) are a series of items in late-medieval Welsh tradition. Lists of the items appear in texts dating to the 15th and 16th centuries. The number of treasures is always given as thirteen, but some later versions list different items, replacing or combining entries to maintain the number.
Manuscripts
Eurys I. Rowlands (1959) published a critical edition of text using 11 texts and 18 variants. Peter C. Bartrum in 1959 who had been working concurrently published an edition using 7 base texts and 13 variants, which catered for the needs of an English readership, but compiled an omnibus version collating 32 manuscripts divided into ten groups, plus 4 published texts.
Manuscript A in the hand of Gwilym Tew dates to c. 1460 but is a plain list of the treasures without the explanatory comments as given in later manuscripts. Other mss. date from the 16th to the 19th century. MS. L or Cardiff MS. 17, dating to c.
The public source identifies “Thirteen Treasures of the Island of Britain” as welsh mythical objects. This brief keeps that definition visible, then builds a research path around Thirteen, Treasures and Island.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Thirteen Treasures of the Island of Britain”, the useful work is to connect “welsh mythical objects” to the records capable of establishing context and consequence.
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 Jul 1, 2026. The linked authority identifier is Q3400089. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1959 and 1460.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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Questions for further research
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This entry incorporates text from “Thirteen Treasures of the Island of Britain” 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.