Divine Mercy (Catholic devotion)
The Divine Mercy is a Catholic devotion to the mercy of God associated with the reported apparitions of Jesus to Faustina Kowalska. The Divine Mercy devotion is composed of several practices such as the Divine Mercy Sunday, the Chaplet of the Divine Mercy or the Divine Mercy image, which Kowalska describes in her diary as "God's loving mercy" towards all people, especially for sinners.
Source: Wikipedia — Divine Mercy (Catholic devotion) (CC BY-SA 4.0)