Originally from here.
Whenever a man wished to marry Agnes, she would always say, “Jesus Christ is my only Spouse.”
Next he sent her to a place of sin, but an Angel protected her. At last, she was condemned to death. Even the pagans cried to see such a young and beautiful girl going to death. Yet, Agnes was as happy as a bride on her wedding day. She did not pay attention to those who begged her to save herself. “I would offend my Spouse,” she said, “if I were to try to please you. He chose me first and He shall have me!” Then she prayed and bowed her head for the death-stroke of the sword.
Other accounts of Agnes’ life hold the Prefect Sempronius responsible for her martyrdom. It is said he condemned the young girl to be dragged through the streets naked. Some versions of the legend state that Agnes’ hair grew instantly to cover her entire body and all the men who attempted to rape the beautiful virgin were immediately struck blind.
The stories go on to explain that another man presided over Agnes’ trial after Sempronius excused himself. The new man sentenced Agnes to death. At first, Agnes was tied to a stake, but either the wood would not burn or the flames parted away from her. This prompted an officer to draw his sword and behead the girl. It is believed that her blood, which poured out to the stadium, was soaked up with cloths by Christians.
She died a virgin-martyr at the age of 12 or 13 on 21 January 304.
Agnes was buried beside the Via Nomentana in Rome. Her bones are currently conserved beneath the high altar in the church of Sant’Angese fuori le mura in Rome, which was built over the catacomb that held her tomb. Her skull is preserved in the church of Sant’Agnese in Agone in Rome’s Piazza Navona.
In 1858, Father Caspar Rehrl, an Austrian missionary founded the Congregation of Sisters of St. Agnes.
St. Agnes is widely known as the patron saint of young girls. She is also the patron saint of chastity, rape survivors and the Children of Mary. She is often represented with a lamb, the symbol of her virgin innocence, and a palm branch, like other martyrs. She is shown as a young girl in robes holding a palm branch with the lamb either at her feet or in her arms.
Her feast day is celebrated on January 21. On her feast day, it is customary for two lambs to be brought in to be blessed by the pope. On Holy Thursday the lambs’ wool is removed and woven into the pallium the pope gives to a newly consecrated archbishop as a sign of his power and union with the pope.