A Gallo-Roman origin has been verified for the settlement of Montsoreau but not confirmed for the castle, even though a fluted column made of stone from a Gallo-Roman temple or a public building was found in the moat during the restoration works of the end of the 20th century. The first written sources are from the 6th century with the domain of Restis, but it is only with the construction of a fortress at the end of the 10th century that the market town began to become prosperous. One part of this first castle was found during the same restoration works by the archaeologists. The castle was reconstructed in a Flamboyant Gothic style between 1450 and 1460 by Jean de Chambes, one of the kingdom's wealthiest men, a senior councillor and chamberlain to King Charles VII and to King Louis XI.