Catholic churches incorporate "Sacred Heart" into their names due to their belief that Jesus Christ's physical heart represents his divine love for humanity. This stems from the 19th century, when a nun requested, in the name of Christ, that the Pope consecrate the entire world to the "Sacred Heart of Jesus."
Roman Catholic tradition, which dates back as far as the 1600s, uses the Sacred Heart in many prayers asking for forgiveness for sins. The Sacred Heart is often depicted in Catholic art as a heart that is on fire and surrounded by a divine light, pierced by a wound and surrounded by a crown of thorns. This symbolizes the suffering and pure love Jesus demonstrated by making the ultimate sacrifice for humanity.