Guillaume IV de Montsoreau was on Geoffrey Plantagenet's side against his brother Henri II Plantagenet, the future King of England, and Eleanor of Aquitaine's husband. The latter besieged the "castrum" and took it at the end of August 1152, despite its fortification. He captured Guillaume and his defenders. Guillaume IV, however, was restored to the castle later. An order of King Henry II of England (about 1068) concerning the landscape project of the Loire was signed by Guillaume de Montsoreau and his son Guillaume. In 1171, Guillaume's son gave the Turpenay monks the right to build tax-free houses inside the "castrum". Gauthier, his eldest son, had no sons and so the lordship passed to the Savary de Montbazon family, on the marriage of his daughter Ferrie in 1213 to Pierre II Savary de Montbazon, lord of Montbazon.