Nyssa, has not always been remembered by historians. Nonetheless, she played an important role in the life of her brothers and, through them, made an impact on the rest of the church. Basil the Great was bishop of Caesarea, among whose writings was an important treatise on the Holy Spirit. His younger brother Gregory of Nyssa was above all a mystic. Their common friend, Gregory of Nazianzus, was a famous orator. One of his most important works is Five Theological Orations on the Trinity. Working together,