History of Christianity
Restorationism refers to various unaffiliated movements that considered contemporary Christianity, in all its forms, to be a deviation from the true, original Christianity, which these groups then attempted to "Reconstruct", often using the Book of Acts as a "guidebook" or sorts.  Restorationism developed out of the Second Great Awakening and is historically connected to the Protestant Reformation, but differs in that Restorationists do not usually describe themselves as "reforming" a Christian church continuously existing from the time of Jesus, but as restoring the Church that they believe was lost at some point. The name Restoration is also used to describe the Latter-day Saints (Mormons) and the Jehovah's Witness Movement.