The Church of Jesus Christ of Latter-day Saints has launched a new website featuring information and resources for learning about and visiting Historic Nauvoo, Illinois, and Carthage Jail. The Church of Jesus Christ of Latter-day Saints has launched a new website to help members learn about and visit historic sites in Nauvoo and Carthage, Illinois. The Church of Jesus Christ of Latter-day Saints has launched a new website to help members learn about and visit historic sites in Nauvoo and Carthage, Illinois.