The first fortified castle was built by Odo the First count of Blois in 990. In 1001, it was taken by the count of Anjou, Fulk Nerra ("Fulk the Black"), one of the greatest builders of the middle age, who gave it to Gautier I of Montsoreau. Gautier I belonged to one of the most pre-eminent families of Anjou. Thus, the Castrum Monsorelli became one of the forty fortified castles in Anjou and one of the few to be given the title of lordship at the turn of year 1000. A town developed quickly near the castle. Fulk and Gautier modified the castle, and this one remained impregnable during more than 150 years. In 1152 and 1156 Henry II King of England, besieged and took twice, the castle of Montsoreau.