There is a range of eschatological belief in Protestant Christianity. Christian premillennialists who believe the End Times are occurring now, are usually specific about timelines that climax in the end of the world. For some, Israel, the European Union, or the United Nations are seen as major players whose roles were foretold in scripture. Within dispensational premillennialist writing, there is the belief that Christians will be summoned to Heaven by Christ at the Rapture, occurring before a "Great Tribulation" prophesied in Matthew 24–25; Mark 13 and Luke 21. The Tribulation is described in the book of Revelation.