On this day in 351, during the reign of Constantius, son of Constantine the Great, the sign of the Cross appeared over Jerusalem. Cyril, Patriarch of Jerusalem, wrote "At about the third hour of the day [mid-morning] an enormous cross, formed of light, appeared in the heaven above holy Golgotha and reaching to the holy Mount of Olives, being seen not by one or two only, but manifest with perfect clarity to the whole multitude of the city; not, as one might suppose, rushing swiftly past in fancy, but seen openly above the earth many hours in plain sight, and overcoming the beams of the sun with its dazzling rays."