Louise Thérèse de Montaignac was a 19th-century French religious figure who dedicated her life to the devotion of the Sacred Heart of Jesus. Born in Le Havre in 1820, she spent much of her life in Montluçon, where she established several pious organizations. Despite suffering from chronic bone disease that frequently left her bedridden, she founded the Oblates of the Sacred Heart in 1874. Her work focused on catechetical instruction and promoting Eucharistic adoration through various societies and educational centers.