Mission-Priests is the name by which those priests of Rome are designated who have been educated for mission work at home or abroad. There are certain monastic institutions that greatly aid in this work. Indeed, several monastic orders aim particularly at missionary work, e.g. the Congregation of the Oratory, the Congregation of St. Vincent of Paula, or Lazarists (q.v.), the Congregation of the Sacred Sacraments, the Congregation of Jesus and Mary, SEE EUDISTS, etc.