Mormons (/ˈmɔrmənz/) are a religious and cultural group related to Mormonism, the principal branch of the Latter Day Saint movement of Restorationist Christianity, which began with Joseph Smith in upstate New York during the 1820s. After Smith's death in 1844, the Mormons followed Brigham Young to what would become the Utah Territory. Today, most Mormons are understood to be members of The Church of Jesus Christ of Latter-day Saints (LDS Church).