Legionaries of Christ Share: Legionaries of Christ Visit Website 315 Garden Ave MANDEVILLE, LA 70471 7088464928 LinkedIn Facebook About Map About We are a religious order of Catholic priests serving here in the State of Louisiana. We have a group of about 350 lay members of our Movement, Regnum Christi, here in Louisiana What's Nearby? Distance: 5 10 15 20 25 50 mi.