Nestorian Christianity, also known as the Church of the East or the Assyrian Church of the East, is a branch of Christianity which was the dominant form of Christianity in China for nearly a thousand years before the arrival of Catholicism and Protestantism in the 16th-17th centuries. | Nestorian Christianity, also known as the Church of the East or the Assyrian Church of the East, is a branch of Christianity which was the dominant form of Christianity in China for nearly a thousand years before the arrival of Catholicism and Protestantism in the 16th-17th centuries. |