Simple Prayer for Peace By St. Francis of Assisi Scroll Design 8.5x11 A Simple Prayer for Peace by St. Francis of Assisi=Antique Scroll Design=8.5" x 11" St. Francis of Assisi wrote the Simple Prayer for Peace in the 1200s. He was an Italian friar and preacher . Though he was never ordained to the Catholic priesthood, Francis is one of the most venerated Catholic religious figures in history. He is the namesake of the Current Pope Francis I.