Each year on September 14 the Orthodox Church celebrates the feast of “The Elevation of the Honorable and Life-Giving Cross.” This is one of the great feasts of the Church year, and one which has an important historical background. Although one or two of the hymns for the day refer obliquely to the vision of the cross in the heavens, the actual commemoration is not that of Constantine’s vision before his battle with Maxentius on October 28, 312. On that occasion, while he was in doubt about the outcome of the impending battle for Italy, he saw in the heavens the arms of the cross stretching far and wide, and the words. “In This Conquer.” The battle won, he did begin to aid Christians, and ended by being baptized himself.
Nor does the feast as celebrated refer to the finding of the cross in Jerusalem by Constantine’s mother, St. Helena, about the year 326, according to the tradition. A great many stories sprang up about this event, but Constantine did erect a great church over the Holy Sepulcher, and in it the cross was enshrined in a reliquary. This church stood for three centuries before it was destroyed by the Persians, during their series of campaigns against the Empire. Whatever were the early feasts observed in Jerusalem in honor of the Finding of the Cross, they became overshadowed by the events of the reign of the Emperor Heraclius, which are what the Feast as it is today does commemorate.
When Heraclius was crowned Emperor on October 5, 610, the provinces on all sides were overrun by the Persians, Avars, and Slavs. He started on a series of internal reforms and embarked on a series of campaigns in due course of time to re-establish Byzantine rule in the neighboring parts of the Empire. The Persians had for some years been harassing Syria and Asia Minor, and in 613 they attacked the city of Damascus. The next year they took Jerusalem, and left a garrison in charge of the city. The population revolted as soon as the main body of the invading army left, and slaughtered the garrison. This brought back the conquerors who are said to have killed 90,000 of the inhabitants. They took the Patriarch Zacharias and the case containing the relics of the cross back to Persia with them.
This event was regarded by all the Christians as the greatest possible disaster, since they regarded the sacred relics as the palladium of the city. Added to this was the insolence of Chosroes, King of the Persians, who taunted the Christians with their religion and their Lord, who so obviously had failed to deliver them. For the next eight years Heraclius was busy with the Avars, and was not able to go out against the Persians until 622. He waged six campaigns between 622 and 627, and finally defeated Chosroes and his generals decisively, but at great cost. The Empire was in great danger: in 626 the Persians were in Asia Minor right across the Bosporus from the City, while their barbarian allies were encamped on the north in Thrace. But Heraclius managed to fight them all off, and restore some control.
He brought back to Jerusalem the Patriarch and the relics of the cross, which had not been molested. The populace demanded to see and venerate the relics, and accordingly they were solemnly elevated for all to see and reverence. The Emperor took a part of the sacred wood back to Constantinople with him. From the time of the finding of the cross by the Empress Helena, small bits of the wood were sent all over the world as most sacred relics, and the part which remained, although large, was still portable.
The hard-won peace of 626 left both the Persian and the Byzantine empires exhausted. At this very time a new danger appeared on the horizon: both Chosroes and Heraclius received letters from the Arab Mohammed, who invited them to adopt Islam, his newly founded faith. They both declined, but their contacts with the Moslems were to be many and difficult. In 629 Arab attacks on the empires began, and in 635 Damascus was taken, and Jerusalem in 637. Heraclius went back to Jerusalem and removed the sacred relics to Constantinople for safe keeping, but the Patriarch remained behind to greet the new rulers.
~Adapted from the website of the Antiochian Orthodox Archdiocese of North America (http://www.antiochian.org/elevationofthecross).