The Church of Jesus Christ of Latter-day Saints, informally known as the LDS Church or Mormon Church, is a nontrinitarian Christian church that considers itself to be the restoration of the original church founded by Jesus Christ. The church is headquartered in the United States in Salt Lake City, Utah, and has established congregations and built temples worldwide. According to the church, it has over 16.8 million members and 54,539 full-time volunteer missionaries. The church is the fourth-largest Christian denomination in the United States, with over 6.7 million US members as of 2021. It is the largest denomination in the Latter Day Saint movement founded by Joseph Smith during the early 19th-century period of religious revival known as the Second Great Awakening.