Liberty Jail is a former jail in Liberty, Missouri, USA where Joseph Smith, Jr., founder of Latter Day Saint movement, and other associates were imprisoned from December 1, 1838 to April 6, 1839 during the 1838 Mormon War. Latter Day Saints sometimes described it as a "prison temple" because of revelations received during Smith's imprisonment there, which are now recorded as Sections 121, 122, and 123 of the LDS Doctrine and Covenants.