The article presents the Council of Chalcedon; its theological and historical context and its consequences. The author starts with the theological context of this Council. In that time the question of relation between humanity and divinity in Christ was discussed. Apollinarius of Laodicea taught that in the person of Christ there were two elements: the Logos and the body. The Logos replaced the soul. He propagated the formula mia physis tou theou logou sesarkomene. Others theologians were not agree with his opinion. Generally, there were two theological schools which worked on this matter: school of Alexandria and of Antioch. In the first one, the Christ was seen especially as God who became man. In the second one, He was seen as the man wh...