Saint Thaïs the Repentant Harlot (4th c.)

She lived in Alexandria, where, when she was seventeen, her own mother placed her in a brothel, where due to her great beauty she was able to amass some wealth. Saint Serapion (March 21), hearing about Thaïs and her way of life, was moved by God to try to convert her. He dressed himself as a soldier, found her, gave her a gold piece, and went with her to her room. When the door was shut, he put aside his tunic, revealing his monastic robe, and asked if he might speak with her. With tears he told her of the doom that awaits sinners, and of the infinite mercy of God, who desires that all should be saved and welcomes every repentant sinner. Thaïs, her heart melted by his words, ran to the public square, burned all the fine clothes and possessions that she had acquired through her trade, and went with Serapion to a women’s monastery.