[1][2] Mansuetus built in the woods a dwelling of interwoven twigs, where he spent his days in prayer and meditation.

Tradition holds that he was responsible for the healing of lepers and for restoring the life of the drowned son of the prince of Toul.

[3] He erected two churches in Toul: one in honor of St. John the Baptist, and the other dedicated to the Blessed Virgin and Saint Stephen.

[8] His Feast day is celebrated on September 3 in the Roman Catholic Diocese of Toul and on August 31 in Saint-Dié .

[9] Various versions of St Mansuy's life were composed in the Middle Ages, the earliest was written by Adso of Montier-en-Der at the request of Gerard of Toul in the mid tenth-century.