Ambrose of Milan was a prominent 4th-century bishop and theologian, known for his significant influence on the Christian Church and its relationship with the Roman Empire. He played a critical role in shaping Christian doctrine, especially in opposition to Arianism, and was instrumental in the development of the concept of the separation of church and state. His tenure as bishop coincided with the reign of Theodosius I, during which he championed the rights of the Church against imperial authority.
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