In 379, the Antioch synod and its archbishop, Meletios, asked Gregory to go to Constantinople to lead a theological campaign to win over that city to Nicene orthodoxy. After much hesitation, Gregory agreed. His cousin Theodosia offered him a villa for his residence; Gregory immediately transformed much of it into a church, naming it Anastasia, "a scene for the resurrection of the faith". From this little chapel he delivered five powerful discourses on Nicene doctrine, explaining the nature of the Trinity and the unity of the Godhead. Refuting the Eunomion denial of the Holy Spirit's divinity, Gregory offered this argument: