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The "catching away of the church" is a false doctrine that was congealed in 1520AD by Francisco Ribera, popularized by John Nelson Darby in the 1830's and then brought to the front by Tim LaHaye and Jerry Jenkins. It is a false doctrine that is going to cause a lot of misery, confusion and loss of belief when the Tribulation occurs and Christ doesn't come in some "secret rapture" and take the church away.
"In 1590, Francisco Ribera, a Catholic Jesuit, taught "futurism" the idea that most of Revelation was about the future, and therefore, not about the Catholic Church. He also taught that the rapture would happen 45 days before the end of a 3.5 year tribulation."