Science Fair Project Encyclopedia
Guy, Duke of Brittany
Guy of Thouars (died April 13, 1213) was Duke of Brittany between 1203 and 1206, succeeding his stepson Arthur I. He was the second husband of duchess Constance and styled himself Duke of Brittany and Count of Richmond in right of his wife.
However, Constance died in 1202, and since Guy's rule was based on thin criteria, King Philip II of France took control of the duchy soon afterwards. Guy served as regent from 1203 to 1213. Eventually he gave Brittany to his cousin Peter of Dreux, married to Alix of Thouars, Guy and Constance's daughter. He died in 1213 and was buried at Villeneuve Abbey Church .
- Everard, J.A. Charters of Duchess Constance of Brittany and her Family, 1999
- Everard, J.A. Brittany and the Angevins, 2000
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