Nicene and Post-Nicene Fathers, Ser. II, Vol I:
The Life of Constantine with Orations of Constantine and Eusebius.: Chapter XLV

Chapter XLV.—Helena’s Pious Conduct in the Churches.

While, however, her character derived luster from such deeds as I have described, she was far from neglecting personal piety toward God. 3278 She might be seen continually frequenting his Church, while at the same time she adorned the houses of prayer with splendid offerings, not overlooking the churches of the smallest cities. In short, this admirable woman was to be seen, in simple and modest attire, mingling with the crowd of worshipers, and testifying her devotion to God by a uniform course of pious conduct.

Footnotes

According to some apocryphal accounts Constantine owed his conversion to his mother (compare the apocryphal letters mentioned under Writings, in the Prolegomena), but Eusebius, below (ch. 47), seems to reverse the fact.