Saint Maria Faustyna Kowalska of the Blessed Sacrament, OLM, popularly spelled Faustina (born as Helena Kowalska; 25 August 1905 in Głogowiec – 5 October 1938 in Kraków, Poland), was a Polish Roman Catholic nun and mystic. Her claims of receiving apparitions of Jesus Christ inspired the Roman Catholic devotion to the Divine Mercy and earned her the title of "Apostle of Divine Mercy".
St. Faustina was a Polish born nun. She was asked to become the apostle and secretary of God's mercy, a model of how to be merciful to others, and an instrument for reemphasizing God's plan of mercy for the world. Her entire life, in imitation of Christ's, was to be a sacrifice - a life lived for others. She wrote and suffered in secret, with only her spiritual director and some of her superiors aware that anything special was taking place in her life.