Returning from the Crusades, the Lords of Largoët, who had helped to found the Order of the Knights of Malta, acquired even more domain in Brittany. They dedicated their charitable work and constructions to their patron saint, St. John the Baptist. In 1160, Duke Conan IV reports on the dedication of the "aumonerie " at Le Gorvello caring for the ill, the destitute and lepers. In 1312, when the Templars were dissolved, the parish fell under the fiefdom of the bishop of Vannes. Judging from accounts that have survived to this day, the construction of the village church lasted at least a century. The carpenter who placed the beams inscribed his name, Thebault, and the year of his work, 1523. The chapel on the northeast side is dated 1547 and the porch 1560. The first records indicating the completion of the village church date to 1624.