William X, Duke of Aquitaine
William X, called the Saint, was Duke of Aquitaine, Duke of Gascony, and Count of Poitou from 1126 to 1137.
Coin of William X 0,890g.
Depiction of the Conversion of William of Aquitaine X at Speed Museum of Art in Louisville
Saint Bernard and the Duke of Aquitaine, by Marten Pepijn
The Duke of Aquitaine was the ruler of the medieval region of Aquitaine under the supremacy of Frankish, English, and later French kings.
Homage of Edward I of England (kneeling) to Philip IV of France (seated), by Jean Fouquet. As Duke of Aquitaine, Edward was a vassal to the French king