Question: The County of Savoy and the Plantaganet monarchy of England had been linked by the marriage of which person, also known as Henry of Winchester, was King of England, Lord of Ireland and Duke of Aquitaine from 1216 until his death, and Eleanor of Provence in 1236? 
Sentence (from "Henry III of England"): Henry promised to abide by the Great Charter of 1225, which limited royal power and protected the rights of the major barons.
Relevant evidence: No