Why did St. Lucy die?

Lucy was a young Christian woman who had made a vow of chastity. A pagan man wanted to marry her but she refused. He went to the Roman authorities who ordered he to renounce her religion and marry the man or face a life of forced prostitution. Again she refused. When the soldiers tried to take her prisoner, they could not lift her or even budge her when she was hitched to oxen. The emperor ordered her burned to death but the flames went out. Finally, they ripped out her eyes and stabbed her to death.