Topic summary
Coptic Church

Extracted from the Wikipedia article Coptic Orthodox Church.
Muslim conquest of Egypt
Despite the political upheaval, the Egyptian population remained mainly Christian. However, gradual conversions to Islam over the centuries had changed Egypt from a Christian to a largely Muslim country by the end of the 12th century. Another scholar writes that a combination of "repression of Coptic revolts", Arab-Muslim immigration, and Coptic conversion to Islam resulted in the demographic decline of the Copts. Egypt's Umayyad rulers taxed Christians at a higher rate than Muslims, driving merchants towards Islam and undermining the economic base of the Coptic Church. Although the Coptic Church did not disappear, the Umayyad tax policies made it difficult for the church to retain the Egyptian elites.