事件基督教公元325325 CE
尼西亚公会议（325）Council of Nicaea (325)
君士坦丁召集的主教会议，处理阿里乌争论并产生信经传统。H 轨：帝国—教会政治与长期争论；T 轨：三位一体正统里程碑。Constantine-summoned bishops addressing the Arian controversy and creedal tradition. H-track: imperial-ecclesial politics and long conflict; T-track: Trinitarian orthodoxy milestone.