According to Christian News Network:
The headquarters for the Mormon religion, also known as the Latter Day Saints (LDS), has acknowledged in a new official essay that its founder practiced polygamy and had up to 40 wives, including a 14-year-old and women who were already married.
“Plural Marriage in Kirtland and Nauvoo” is the first of a three-part series to be posted on the LDS.org website, and focuses on the life of Joseph Smith and the many wives that he took to himself after purportedly being commanded by an angel to “practice plural marriage.”