There are two questions here.
- Did St. Helena recover the real titulus as part of her True Cross dig, which she did where the Christians of Jerusalem told her to look?
This is where things are a little unclear. The earliest account we have - Eusebius’
Life of Constantine - does not mention the True Cross at all. Rather, the focus was on Constantine ordering that the site of Jesus’ tomb be uncovered and instructing Macarius, bishop of Jerusalem to build a church on the site. (While it is still far from certain whether the traditional site is the real location, it does have some
pretty strong claims for its authenticity.)
After these things, the pious emperor addressed himself to another work truly worthy of record, in the province of Palestine. What then was this work? He judged it incumbent on him to render the blessed locality of our Saviour’s resurrection an object of attraction and veneration to all. He issued immediate injunctions, therefore, for the erection in that spot of a house of prayer: and this he did, not on the mere natural impulse of his own mind, but being moved in spirit by the Saviour himself. …]
[A]s soon as the original surface of the ground, beneath the covering of earth, appeared, immediately, and contrary to all expectation, the venerable and hollowed monument of our Saviour’s resurrection was discovered. Then indeed did this most holy cave present a faithful similitude of his return to life, in that, after lying buried in darkness, it again emerged to light, and afforded to all who came to witness the sight, a clear and visible proof of the wonders of which that spot had once been the scene, a testimony to the resurrection of the Saviour clearer than any voice could give.
Immediately after the transactions I have recorded, the emperor sent forth injunctions which breathed a truly pious spirit, at the same time granting ample supplies of money, and commanding that a house of prayer worthy of the worship of God should be erected near the Saviour’s tomb on a scale of rich and royal greatness …
It was
Socrates Scholasticus, writing around the early 5th century, who first gives the account of the finding of the True Cross. The task of the discovery of both sepulchre and cross is now attributed to Constantine’s mother Helena. In Socrates, Macarius has the three crosses placed in turn on a deathly ill woman. This woman recovered at the touch of the third one, which was taken as a sign that this was the true Cross. Socrates also reports that, having also found the nails with which Jesus had been fastened to the cross, Helena sent these to Constantinople, where they were incorporated into the emperor’s helmet and the bridle of his horse.
Contemporary and later writers parrot Socrates’ account: Sozomen (died c. 450) only adds the detail that it was said (by whom he does not say) that the location of the tomb was “
disclosed by a Hebrew who dwelt in the East, and who derived his information from some documents which had come to him by paternal inheritance” (although Sozomen himself disputes this account) and that a dead person was also revived by the touch of the True Cross. It is with Theodoret’s
account that we get the standard version of the story. Interestingly, a Syriac legend (later also passed down in Armenian) has it that the True Cross was discovered, not by Helena, but by an empress named
Protonike, who is alleged to be the wife of the emperor Claudius (AD 41-54): most versions, however, attempt to harmonize the various conflicting stories by making it appear that after Protonike discovered the True Cross, it was eventually hidden again until Helena (or the Jew Judas, aka
Kyriakos) found it again.
All in all, we have three versions of the story of the finding of the True Cross: the Helena version (in which Helena
herself discovers the artifacts in question), and its two deritatives the Kyriakos version (where the actual discovery is made by Judas the Jew, who eventually converts and changes his name to Kyriakos), and the Protonike version. We don’t know for certain which part of the story is factual and which parts are apocryphal, but it is certain that the Basilica of the Holy Sepulchre was completed by 335 and that alleged relics of the Cross were being venerated there at least a decade later.