What is St. Sophia known for?

There is some doubt if Sophia ever lived or was simply the subject of a pious story circulating in the early years of the church. The story states that Sophia was the mother of three young daughters named Faith, Hope and Charity. Sophia was arrested for being a Christian and told she must renounce her religion and become a pagan or her daughters would be killed. Sophia refused and was forced to watch as her daughters were martyred one by one. Sophia was found dead three days later on the tomb of her children where she had gone to pray.