The City God Built—The Book of Revelation
As covered, the biggest gate of hell was opened into the church when positions of authority in the church became based on the approval of men rather than God. This began in the early fourth century when the Emperor Constantine made Christianity the official religion of the Roman Empire. Officials of the empire were required to be Christian. This caused all manner of ambitious and evil people to enter the church to gain favor with the government, not because of a true conversion.