The beast in Revelation is the mainstream church of Christendom.
This article firstly compared Daniel 7 to Revelation 13 and shows that the beast in the book of Revelation is the same as the evil horn in the Book of Daniel. It then compares the horn in Daniel 7 to history, and identifies the horn, and therefore the beast, as the church of the middle ages. The article then confirms this identification by showing that Revelation 13 identifies the beast as a Christian organization. Lastly, this article discusses the identity of the end-time antichrist and describes it as the mainstream church of Christendom.