The True Church of Jesus Christ of Latter Day Saints or True Mormon Church was a denomination of the Latter Day Saint movement. It was founded in the spring of 1844 in Nauvoo, Illinois, by leaders dissenting from the Church of Jesus Christ of Latter Day Saints. This group was responsible for printing the Nauvoo Expositor, which was also critical of Smith and polygamy, leading to his death and contributing to the expulsion of the Latter Day Saints from Nauvoo.