Anima Christi
"Soul of Christ, sanctify me," this beautiful ancient Latin prayer begins. It is believed to originate from the first half of the fourteenth century, and indulgences were ascribed to it by Pope John XXII in 1330. The author is debated; the "Anima Christi" is popularly attributed to St. Ignatius Loyola. However, the prayer is in manuscripts written a hundred years before his birth in 1491.