Gansbert a French monk, and celebrated reformer of various monasteries, was born in the early half of the 10th century, of a noble family. The record of the foundation of the abbey of Bourgueil, in 991, mentions him as the abbot of St. Julien of Tours at that period. He was also simultaneously abbot of Bourgueil-en-Valle, of St. Pierre de la Couture, at Mons, of Maillegals, and of Marmoutiers. The Histoire Litteruire de la France states that he reformed these monasteries, and that he established a great number of charters, which we are unable to mention. About 1000 he went to Rome, and obtained of pope Sylvester the confirmation of the privileges of St. Julien. In 1001 he engaged in important discussions with a certain knight named Gautier, upon the subject of the immunities of Bourgueil. The same year he received of queen Bertha various manors. He died at Bourgueil, Sept. 27, but there is much uncertainty about the year, some making it 1006, others 1007. See Hoefer, Nouv. Biog. Generale, s.v.