Chastel Estroit, Chastel Etroit

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A fortress in North Wales where Dinadan had to defend himself against a charge of murder. Brunor the Black, Dinadan’s brother, championed Dinadan and acquitted him.

The castle seems to be ruled by the Duke of Haudebourc, who presided over the combat.

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Source
Prose Tristan | 1230-1240