St. John Paul II established the first Sunday after Easter as a universal feast for Divine Mercy in the Church 19 years ago.
Co-authors, Grzegorz Górny and Janusz Rosikoń, say it is part of a “black series,”
"St. Jerome in the Desert" will be exhibited in St. Peter's Square until June 22.
The image had been stolen, bought and buried. It was painted after St. Faustina Kowalska received an apparition from Christ.