In this well-documented and clear study, the history of Christianity in Egypt is discussed. It critically and attractively focuses on early Egyptian Christianity, from its earliest recorded origins to the Council of Chalcedon in 451 CE. That was the moment, after the separation from the Catholic University, when the Egyptian Coptic Church became the national religion. During this period, we observe the development of features unique to Egyptian Christianity, such as the imposition of Catholic ecclesiasticism in Alexandria and southward, and the presence of forces that would lead to the establishment of a national religion. This study will greatly contribute to an increased understanding of early Egyptian Christian history and the manner in which that religion was dispersed in other countries. It also adds to the understanding of the general history of early Christianity.