The Congregation of Marian Fathers of the Immaculate Conception of the Most Blessed Virgin Mary (Latin: Congregatio Clericorum Marianorum ab Immaculata Conceptionis Beatissimae Virginis Mariae) is a Catholic male clerical religious congregation founded, 1670, in Poland. It is also known as Marians of the Immaculate Conception. Its members add the post-nominal letters M.I.C. after their names to indicate membership in the Congregation.