According to the 1955 Roman Catholic Marian Missal, Helena went to Jerusalem to search for the True Cross and found it September 14, 320. In the eighth century, the feast of the Finding was transferred to May 3, and September 14 became the celebration of the "Exaltation of the Cross", the commemoration of a victory over the Persians by Heraclius, as a result of which the relic was returned to Jerusalem.[citation needed]