Helena of Constantinople, also known as Saint Helena, was a Roman empress and the mother of Emperor Constantine the Great. She is best known for her significant role in promoting Christianity within the Roman Empire during the early 4th century. Helena is often credited with finding the True Cross, the cross upon which Jesus was crucified, during her pilgrimage to Jerusalem. Helena's influence extended beyond her religious contributions; she was instrumental in the construction of several important churches, including the Church of the Holy Sepulchre in Jerusalem. Her legacy is celebrated in both the Christian faith and historical accounts, and she is venerated as a saint in various Christian traditions.