Original: Council of Chalcedon (/O451/O) repudiated the Eutychian doctrine of monophysitism , adopted the Chalcedonian Creed , which described the hypostatic union of the two natures of Christ , human and divine .
Simplified: Council of Chalcedon , (/O451/O) ; declared the doctrine of monophysitism to be wrong and adopted the Chalcedonian Creed .