The Missionaries of the Sacred Heart (MSC) are an international community of religious men of the Catholic Church who believe that nothing is more important than the saving power of God's love. The initials M.S.C. come from the Latin: Missionarii Sacratissimi Cordis.

In 1854, a French parish priest, Jules Chevalier, gathered a small group of like-minded priests and formed the MSC congregation under the protection of Our Lady of the Sacred Heart. Their concern was global, but they began with efforts to restore the vitality of the faith in rural France. On September 1, 1881, the first missionaries left for Papua New Guinea, the fulfillment of a dream that Fr. Chevalier already had as a seminarian.