Nestorianism is a based on what is called "Dyophysitism", which is the Christian belief that Jesus Christ was God and human, having two natures in what is called the hypostatic union. Nestorianism can be described as the belief that Jesus was having loosely two natures, and did not believe in the hypostatic union, but rather more in a prosopic union. The belief traces its roots to Nestorius, the Archbishop or Patriatch of Constantinople.