Fourth-century Christianity is perhaps best remembered for the Trinitarian controversies that flared with the rise of Arius early on and continued until the Council of Constantinople in 381. In the East, some of the key figures involved in that controversy were the Cappadocian Fathers—Basil of Caesarea, Gregory of Nazianzus, and Gregory of Nyssa. Lesser known is the life of Saint Macrina (ca. 327–379), the eldest sister of Basil of Caesarea and Gregory of Nyssa, yet her faith influenced her brothers in profound ways. And her brother Gregory memorialized her in an account of her life, The Life of Saint Macrina, which offers readers today a portrait of female piety in the early church.