The Prefect Sempronius wished Agnes to marry his son, and on Agnes' refusal he condemned her to death. As Roman law did not permit the execution of virgins, Sempronius had a naked Agnes dragged through the streets to a brothel. Various versions of the legend give different methods of escape from this predicament. In one, as she prayed, her hair grew and covered her body. It was also said that all of the men who attempted to rape her were immediately struck blind. In another the son of the prefect is struck dead, but revived after Agnes prayed for him, causing her release. There was then a trial from which Sempronius excused himself, and another figure presided, sentencing her to death. When led out to die she was tied to a stake, but the bundle of wood would not burn, or the flames parted away from her, whereupon the officer in charge of the troops drew his sword and beheaded her, or, in some other texts, stabbed her in the throat. It is also said that the blood of Agnes poured to the stadium floor where other Christians soaked up the blood with cloths.
Eternal God, shepherd of your sheep,
whose child Agnes was strengthened to bear witness
in her living and her dying
to the true love of her redeemer:
grant us the power to understand, with all your saints,
what is the breadth and length and height and depth
and to know the love that surpasses knowledge,
even Jesus Christ your Son our Lord,
who is alive and reigns with you,
in the unity of the Holy Spirit,
one God, now and for ever.