The Lost History of Christianity: The Thousand-Year Golden Age of the Church in the Middle East, Africa, and Asia—and How It Died

by Philip Jenkins

Mosques look as they do because their appearance derives from that of Eastern Christian churches in the early days of Islam. Likewise, most of the religious practices of the believers within those mosques stem from the example of Eastern Christians, including the prostrations that appear so alien to modern Westerners. The severe self-denial of Ramadan was originally based on the Eastern practice of Lent. The Quran itself often shows startling parallels with Eastern Christian scriptures, devotional texts, and hymns, and some scholars have even argued that much of the text originated in Syriac lectionaries, collections of readings for church use.