What did Henry III of England give up in the Treaty of Paris of 1259?

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Louis IX Louis IX, carrying the hand of justice.

In the Treaty of Paris of 1259, Henry III of England formally renounced his claims to Normandy, Anjou, Maine, Touraine, and Poitou.123

In exchange for relinquishing these territories, Henry III was permitted to retain the duchy of Guyenne—a reduced remnant of Aquitaine that included Gascony—provided that he acknowledged himself as a vassal to Louis IX of France for those lands. This agreement was intended to establish a lasting peace between the two monarchs, who were brothers-in-law and maintained a mutual respect for one another.435