According to Latter Day Saint belief, the golden plates (also called the gold plates or in some 19th-century literature, the golden bible) are the source from which Joseph Smith translated the Book of Mormon, a sacred text of the faith. Some witnesses described the plates as weighing from 30 to 60 pounds (14 to 27 kg), gold in color, and composed of thin metallic pages engraved with hieroglyphics on both sides and bound with three D-shaped rings.Smith said that he found the plates on September 22, 1823, on a hill near his home in Manchester, New York, after the angel Moroni directed him to a buried stone box. He said that the angel prevented him from taking the plates but instructed him to return to the same location in a year. He returned to that site every year, but it was not until September 1827 that he recovered the plates on his fourth annual attempt to retrieve them. He returned home with a heavy object wrapped in a frock, which he then put in a box. He allowed others to heft the box but said that the angel had forbidden him to show the plates to anyone until they had been translated from their original "reformed Egyptian" language.

Smith dictated the text of the plates while a scribe wrote down the words which would later become the Book of Mormon. Eyewitnesses to the process said Smith translated the plates, not by looking directly at them, but by looking through a transparent seer stone in the bottom of his hat. Smith published the first edition of the translation in March 1830 as the Book of Mormon, with a print run of 5,000 copies at a production cost of $3,000 (or 60 cents per book).

Smith eventually obtained testimonies from 11 men who said that they had seen the plates, known as the Book of Mormon witnesses. After the translation was complete, Smith said that he returned the plates to the angel Moroni; thus they could never be examined. Latter Day Saints believe the account of the golden plates as a matter of faith, while critics often assert that either Smith manufactured them himself or that the Book of Mormon witnesses based their testimony on visions rather than physical experience.

Joseph Smith Jr. (December 23, 1805 – June 27, 1844) was an American religious leader and founder of Mormonism and the Latter Day Saint movement. When he was 24, Smith published the Book of Mormon. By the time of his death, 14 years later, he had attracted tens of thousands of followers and founded a religion that continues to the present with millions of global adherents.

Smith was born in Sharon, Vermont. By 1817, he had moved with his family to Western New York, the site of intense religious revivalism during the Second Great Awakening. Smith said he experienced a series of visions, including one in 1820 during which he saw "two personages" (whom he eventually described as God the Father and Jesus Christ), and another in 1823 in which an angel directed him to a buried book of golden plates inscribed with a Judeo-Christian history of an ancient American civilization. In 1830, Smith published what he said was an English translation of these plates called the Book of Mormon. The same year he organized the Church of Christ, calling it a restoration of the early Christian church. Members of the church were later called "Latter Day Saints" or "Mormons", and Smith announced a revelation in 1838 that renamed the church as The Church of Jesus Christ of Latter Day Saints.

In 1831, Smith and his followers moved west, planning to build a communal American Zion. They first gathered in Kirtland, Ohio, and established an outpost in Independence, Missouri, which was intended to be Zion's "center place". During the 1830s, Smith sent out missionaries, published revelations, and supervised construction of the Kirtland Temple. Because of the collapse of the church-sponsored Kirtland Safety Society Anti-Banking Company, violent skirmishes with non-Mormon Missourians, and the Mormon extermination order, Smith and his followers established a new settlement at Nauvoo, Illinois, where he became a spiritual and political leader. In 1844, when the Nauvoo Expositor criticized Smith's power and practice of polygamy, Smith and the Nauvoo city council ordered the destruction of their printing press, inflaming anti-Mormon sentiment. Fearing an invasion of Nauvoo, Smith rode to Carthage, Illinois, to stand trial, but he was killed when a mob stormed the jailhouse.

Smith published many revelations and other texts that his followers regard as scripture. His teachings discuss the nature of God, cosmology, family structures, political organization, and religious collectivism. His followers regard him as a prophet comparable to Moses and Elijah. Several religious denominations identify as the continuation of the church that he organized, including The Church of Jesus Christ of Latter-day Saints and the Community of Christ.