In the seventh century, when the new religion of Islam burst onto the world scene and began its campaign of expansion, the Nestorians were quick to pass on their knowledge to their Arab conquerors.
पाँचवीं शताब्दी के दौरान, नेस्टोरियस, कौंस्टैंटिनोपोल का कुलपिता, एक विवाद में उलझ गया जो पूर्वी गिरजे में फूट की तरफ ले गया ।