The Thirteen Treasures of Britain belong to an older stratum of Welsh tradition, where objects carry meaning beyond their use. Each treasure reflects a specific quality – courage, generosity, legitimacy, or truth – forming a symbolic world in which power is revealed through worth rather than possession.

Welsh | Tri Thlws ar Ddeg Ynys Prydain

The Treasures#

The Thirteen Treasures of the Island of Britain are a group of magical artifacts recorded in medieval Welsh tradition. Each treasure possesses a distinctive property, often linked to moral worth, nobility, or rightful status.

Unlike later Arthurian romances, these objects do not form a single narrative. Instead, they belong to an older mythological framework in which symbolic items reflect ideals of kingship, honor, and social order.

Only one of the treasures is directly associated with King Arthur, yet many of them resonate strongly with themes later developed in Arthurian literature – particularly ideas of testing, abundance, and divine or moral selection.

Some later traditions claim that Merlin gathered these treasures and took them to a glass house (Ty Gwydr), though this detail does not appear in the earliest sources.

I. Dyrnwyn#

White-Hilt#

The sword of Rhydderch Hael (Rhydderch the Generous). If drawn by a worthy man, it would burst into flame and grant its bearer power – but few dared to test it.

II. Mwys Gwyddno Garanhir#

The Hamper of Gwyddno Long-Shank#

A magical hamper that could multiply food, providing enough sustenance for many from a small portiond

III. Corn Bran Galed#

The Horn of Bran the Strong#

A drinking horn that could provide any beverage desired by its bearer.

IV. Cadair/Car Morgan Mwynfawr#

The Chariot of Morgan the Wealthy#

Described as either a chair or chariot, it could instantly transport its rider wherever he wished.

V. Kebystr Clydno Eiddin#

The Halter of Clydno Eiddin#

Would produce any horse its owner desired.

VI. Cyllell Llawfrodedd#

The Knife of Llawfrodedd the Horseman#

A magical knife capable of serving food to many men at once.

VII. Pair Diwrnach#

The Cauldron of Diwrnach the Giant#

Would only boil meat for a brave man – refusing to cook for a coward.

VIII. Hogalen Tudno#

The Whetstone of Tudno#

Sharpened the weapon of a brave warrior so that it could strike a deadly blow, but was useless to a coward.

IX. Pais Padarn Beisrudd#

The Coat of Padarn Redcloak#

Would fit a noble man perfectly, but would not fit one of low birth.

X. Dysgl Rhygenydd#

The Dish of Rhygenydd the Cleric#

Would provide whatever food its owner desired.

XI. Gwyddbwyll Gwenddolau#

The Chessboard of Gwenddolau#

The pieces would move and play by themselves.

XII. Llen Arthur yng Nghernyw#

Arthur’s Mantle in Cornwall#

Rendered its wearer invisible, owned by Eiryn the Splendid.

XIII. Mantle of Tegau Eurfron#

(Later variant tradition)#

In later lists, this mantle replaces or accompanies another treasure. It revealed whether a woman was chaste.

Variant Traditions#

Some manuscripts differ slightly in their lists. Additional items sometimes included are:

– The Ring (or Ring and Stone) of Eluned (Lunete) – granting invisibility
– The Mantle of Tegau Eurfron – testing chastity

These variations reflect the blending of native Welsh tradition with later continental Arthurian romance.

Arthurian Connections and Significance#

The Treasures are not random magical objects – they form a symbolic system reflecting key cultural ideals: worth and virtue, abundance and provision, testing and revelation, sovereignty and legitimacy.

Although primarily rooted in Welsh tradition, the Treasures influenced later Arthurian literature. Together, these connections show how early Celtic mythology and later Arthurian romance gradually merged.

- The Cauldron of Diwrnach parallels Grail symbolism
- The Horn of Bran Galed reflects abundance motifs later seen in Grail vessels
- The Mantle of Tegau Eurfron echoes chastity-testing mantles in French romance
- The Gwyddbwyll board parallels enchanted chessboards in continental texts

The Thirteen Treasures of the Island of Britain preserve a vision of a mythic world governed by moral order rather than brute force. Power is conditional, tied to character, and revealed through testing. They stand as one of the clearest survivals of early British myth within the broader Arthurian tradition.

Sources#

Triads of the Island of Britain (Welsh ”Triads”) | 11th century to 14th century

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The Thirteen Treasures of Britain

Introduction#