1675 · Paray-le-Monial, France
Formalization of Sacred Heart Devotion
In the 1670s, a Visitation nun named Margaret Mary Alacoque reported visions of Christ revealing his heart as a symbol of his love for humanity, launching a devotion that would become one of the most widespread in the Catholic world.
Devotion to the heart of Jesus had existed in a scattered way for centuries. Medieval mystics like Gertrude the Great and Mechtilde of Hackeborn had written about it. But it was Margaret Mary Alacoque, a Visitation nun in Paray-le-Monial, France, who turned it into a movement. Between 1673 and 1675, she reported a series of visions in which Christ showed her his heart — burning with love, crowned with thorns, and wounded by human indifference. He asked for specific devotions: a holy hour on Thursday nights, Communion on the first Friday of each month for nine consecutive months, and a feast day dedicated to his Sacred Heart. Her confessor and spiritual director, the Jesuit Claude de la Colombière, believed her and promoted the devotion. Not everyone was convinced. The Jansenists, who dominated French Catholic intellectual life at the time and favored a severe, austere spirituality, dismissed it as emotional excess. It took decades for the devotion to gain official approval. Pope Clement XIII approved the feast in 1765 for certain dioceses, and Pius IX extended it to the universal Church in 1856. In 1899, Leo XIII consecrated the entire human race to the Sacred Heart. The image of the Sacred Heart — Christ pointing to his exposed, flaming heart — became one of the most recognizable in Catholicism. It hung in homes, classrooms, and hospitals across the Catholic world. The devotion emphasized something the Jansenists resisted: that God's love is not cold or distant but passionate, personal, and wounded by rejection.
Why it matters
Established one of the most widespread Catholic devotions, emphasizing the personal and merciful love of Christ and producing practices — First Friday Communion, the holy hour — still observed by millions.
What Happened
Between 1673 and 1675, Margaret Mary Alacoque, a Visitation nun in Paray-le-Monial, reported visions of Christ asking for devotion to his Sacred Heart. Her Jesuit confessor Claude de la Colombière championed the cause. Despite opposition from Jansenists, the devotion spread. The feast was approved for certain dioceses in 1765, extended universally in 1856, and in 1899 Pope Leo XIII consecrated all humanity to the Sacred Heart.
Why It Still Matters
The Sacred Heart remains one of the most recognizable Catholic devotions. First Friday Communion, Thursday holy hours, and the image of Christ's heart are part of ordinary Catholic life in parishes worldwide. The devotion shaped Catholic spirituality by insisting that God's love is not abstract or impersonal but tender, active, and hurt by human sin — an emphasis that continues to influence how Catholics understand mercy and prayer.