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What did the Second Council of Constantinople in 553 teach about Christ as one person?

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Christology The Transfiguration, the nature of Jesus as the Son of God being revealed to the apostles Peter, James, and John, mosaic icon, early 13th century; in the Louvre, Paris.

The Second Council of Constantinople (553) further defined Jesus Christ as a unique, single person—a hypostasis—and one member of the Trinity.1

To reinforce this doctrine, the council issued 14 anathemas that explicitly rejected Nestorianism. By doing so, the council insisted upon the hypostatic unity of Christ, affirming that he exists as one person in two distinct natures: divine and human. This teaching served to uphold the integrity of the Incarnation by ensuring that the divine and human aspects of Christ are not separated, but rather united in his single personhood.21