The few remaining Mormons left in Nauvoo, Illinois, formally dedicate the Nauvoo Temple.

Mormons are a religious and cultural group related to Mormonism, the principal branch of the Latter Day Saint movement started by Joseph Smith in upstate New York during the Second Great Awakening. After Smith's death in 1844, the movement split into several groups following different leaders; the majority followed Brigham Young, while smaller groups followed Sidney Rigdon and James Strang. Many who did not follow Young eventually merged into the Community of Christ, led by Smith’s son, Joseph Smith III. The term Mormon typically refers to members of the Church of Jesus Christ of Latter-day Saints, the largest branch, which followed Brigham Young. People who identify as Mormons may also be independently religious, secular, and non-practicing or belong to other denominations.