Gold Plates. An historical record of American peoples written on plates of gold. In A.D. 421, Moroni, a Nephite warrior and son of Mormon, buried the plates in the Hill Cumorah. In 1823, as a resurrected being, Moroni revealed the whereabouts of the plates to Joseph Smith who was permitted to retrieve them in 1827. The Book of Mormon was supposedly translated from these plates. Joseph Smith claimed that after he finished translating the plates they were given back to Moroni (Joseph Smith History 1:60). Apostle Robert D.