Castle of Wonders is a castle standing in the middle of a lake, reached by Peredur during his search for the marvels he has been pursuing. Its open gates admit him to a hall where chessmen move without human players. The castle’s name promises wonders, but the episode does not explain why it bears that name; instead, the chessboard’s strange play and the consequences of Peredur’s intervention make the place a threshold into a further series of trials.

Route and Setting

Peredur learns how to continue his search after travelling for a year. On Good Friday, a priest rebukes him for travelling in armour and tells him the day; Peredur explains that it has been a year since he left his country. The priest gives him shelter and, after keeping him for the following days, directs him toward a king’s palace where he may hear news of the Castle of Wonders. The king’s daughter then supplies the route: Peredur must cross a mountain and find a lake, with the castle in its middle.

The location is thus disclosed through stages rather than encountered by chance: the priest points Peredur toward a court, and the king’s daughter gives the decisive geographical detail. The account offers no description of the lake’s size, the castle’s construction, or how a visitor crosses the water. It does establish that the gate and the hall stand open when Peredur arrives, allowing him to enter without an obstacle or escort.

The Chessboard and Peredur’s Intervention

Inside the hall, Peredur sees a chessboard whose pieces are playing against one another by themselves. He favours one side, but that side loses. The pieces then raise a shout as if they were living people. Peredur grows angry, gathers the chessmen in his lap, and throws the board into the lake. The scene makes the castle’s marvel concrete: the game is animated, yet Peredur responds not with curiosity but with a forceful intervention that destroys the arrangement he has found.

The black maiden appears after the board has been cast away and condemns Peredur’s action. She explains that the chessboard belongs to the Empress of Cristinobyl the Great and that recovering it requires him to go to the Castle of Ysbidinongyl, where a black man is ravaging the Empress’s lands. Peredur’s impulsive act therefore turns the castle from a destination into the beginning of an obligation: the loss he has caused is attached to a larger threat beyond its walls.

The Challenge Extends Beyond the Castle

At the Castle of Ysbidinongyl, Peredur defeats the black man, who begs for mercy. Peredur grants it on condition that the chessboard be restored to the place where he found it. The black maiden objects that the man is still alive and continues to devastate the Empress’s possessions; when Peredur returns, she tells him to go back and kill him. The episode sets Peredur’s personal terms of mercy against the destruction the black man inflicts, and the maiden’s rebuke changes the task from securing a promise to ending the threat.

After Peredur returns, the black maiden directs him toward another danger before he can see the Empress: a swift stag with a spear-long horn that destroys trees, kills animals, and drinks the water from a fishpond each night, leaving its fish exposed. The surviving account later associates the chessboard and the black maiden’s successive directions with Peredur’s other encounters, including the stag and a black man at a cromlech. The castle’s episode consequently opens a chain of linked trials rather than resolving into a single, self-contained marvel.

Narrative Significance and Revelation

The castle’s wonders are presented through action and consequence, not through an explanation of its history. Its self-playing chess creates a scene in which Peredur’s preference for one side is immediately frustrated; his anger then sends the board into the lake and obliges him to pursue the Empress’s interests. The passage does not say that the board is recovered, so the initial damage remains the catalyst for the challenges that follow rather than a problem with a recorded resolution here.

A later revelation connects the black maiden to Peredur’s own family history. A yellow-haired youth tells Peredur that he had appeared in the maiden’s form during the chessboard episode and the subsequent encounters, and identifies himself as Peredur’s cousin. He also says that Peredur is destined to avenge the cousin’s death and the laming of Peredur’s uncle by the sorceresses of Gloucester. The Castle of Wonders thus belongs not only to the marvel-seeking strand of Peredur’s journey but also to the sequence of signs and encounters that leads toward recognition of his kinship and the vengeance foretold for him. The narrative closes its account of the castle after the linked adventures, leaving its promised wonders unexplained while making its role in Peredur’s larger quest unmistakable.