Completion of the First Council of Constantinople

The First Council of Constantinople concluded, affirming Nicene Christianity's doctrines. Convened by Emperor Theodosius I, it aimed to address controversies within the Church, particularly regarding Arianism and the nature of the Holy Spirit, reaffirming the Nicene Creed. Approximately 150 bishops attended, and important decisions shaped future Christian orthodoxy, leading to strengthened imperial support for Nicene Christianity.