What is Roman Catholic Church's official view on the nature of Christ? One question that has haunted the Catholic Church from the very beginning is about the way divine and human are related in the person of Jesus Christ. The differences in doctrines have lead to the creation of Assyrian Church of the East and Oriental Orthodox Church. The Council of Chalcedon in AD 451 has accepted Dyophysitism as the accepted Catholic doctrine. But is this the final stand made by the Catholic Church? Or did any post Chalcedonian councils further clarified this matter? This being such a sensitive topic could any one please explain the official Catholic position on the nature of Christ?
Yes, there were subsequent ecumenical councils that dealt with the matter. As explained in the Catechism of the Catholic Church, paragraph 468:


  After the Council of Chalcedon, some made of Christ’s human nature a kind of personal subject. Against them, the fifth ecumenical council at Constantinople in 553 confessed that "there is but one hypostasis [or person], which is our Lord Jesus Christ, one of the Trinity." Thus everything in Christ’s human nature is to be attributed to his divine person as its proper subject, not only his miracles but also his sufferings and even his death: "He who was crucified in the flesh, our Lord Jesus Christ, is true God, Lord of glory, and one of the Holy Trinity."