The Millennium is a 1000yr period following the second coming of Christ during which Christ reigns with His Bride (The Church) in Heaven. <br />During the Millennium, the Born Again Believers will reign with Christ in Heaven over Israel and the Purified Nations on Earth. <br />After this God will make all things New and the Son will hand the Kingdom back to the Father. <br />God will then reign for Eternity with His Bride (Born Again Believers) in the New Jerusalem surrounded by the New Nations (whose names were in the Lamb's Book of Life).
