Results of the councils of Nicäa 325 and Constantinople 381 on relationship of God Father to Jesus Christ and Holy Spirit respectively accepted by the entire church. In contrast, controversies during the councils of Ephesus 431 and Chalcedon 451 on the nature of Jesus Christ had led to the first schisms of the Christian church. In addition to the Orthodox Church the oriental churches arose, after the 1054 separation the third branch of Christianity. Blamed as heretic and prosecuted by the official church, both Monophysites and Nestorians were driven into the Iranic Empire, deploying mainly towards its east and south-east. Using the silk roads as natural axes Nestorianism spread soon over Central Asia gaining whole tribes as adherents, ending in imperial China by the end of the 7th century. Due to favorable conditions it succeeded soon in extending until a change within the imperial court led to a complete breakdown by the end of the 10th century. In Central Asia Christian communities managed to survive thanks to their ability to adapt to local religious ideas and thanks to the typical religious tolerance of the Mongolians. Incidentally the marriage policy of Jenghis Khan resulted in several Nestorian Mongolian princesses gaining political influence as mothers of future rulers. This was still enhanced by the activities of high rank Nestorian officials. Thus the Church of the East was able to profit from the Mongolian expansion into Persian and Chinese land developing favourably. At that time the range of influence of the Church of the East was greater than that of the Roman and Orthodox together. Political and religious contacts were established with the West, Nestorians in the Middle East even serving as solicitors for alliances. After the decline of the respective dynasties Christianity was overwhelmed by the religions of the local majority. In the second half of the 14th century it became extinct in China and was pushed back to minimal fringe positions in Persia.