The devotion to the Sacred Heart of Jesus is centered on the physical heart of Christ as the symbol of His boundless love for humanity. While devotion to Christ's love has ancient roots, the modern devotion was shaped by the apparitions of Jesus to St. Margaret Mary Alacoque, a Visitation nun in Paray-le-Monial, France, between 1673 and 1675. Jesus revealed His heart, surrounded by flames and crowned with thorns, and made twelve promises to those who honor His Sacred Heart, including the grace of final repentance and the promise that He would bless every place where an image of His Heart is exposed and honored. Jesus asked for: (1) Frequent Communion, especially on the First Friday of each month. (2) Holy Hour of Adoration on Thursday nights. (3) The establishment of the Feast of the Sacred Heart (celebrated on the Friday after Corpus Christi). Pope Pius IX extended the feast to the universal Church in 1856. Devotion to the Sacred Heart was also promoted by Popes Leo XIII (who consecrated the world to the Sacred Heart) and Pius XI (encyclical Miserentissimus Redemptor).