Marianist, a religious congregation of the Roman Catholic church founded by William Joseph Chaminade at Bordeaux, Fr., in 1817. The Marianists, including the Brothers of Mary, developed from the sodality (a devotional association of the laity) of the Blessed Mother organized in 1800 by Chaminade. The Institute of the Daughters of Mary, or Marianist Sisters, was also a product of this sodality. The male congregation, which is spread throughout western Europe, the Americas, Asia, Africa, and Australia, is engaged primarily in Christian education. To the usual religious vows of poverty, chastity, and obedience, the Marianists add a fourth vow of stability, faithfulness to the congregation, and special consecration to Mary. As an outward sign of this fourth vow, they wear a gold ring on their right hand.