January 21, 1836
Kirtland, Ohio
While in the Kirtland Temple with the First Presidency, Joseph Smith saw a vision of the celestial kingdom and the Father and the Son, which is recorded in Doctrine and Covenants 137.
Sources:
History of the Church, Joseph Smith, 2:379–82
Opening the Heavens: Accounts of Divine Manifestations, 1820–1844, John W. Welch, p. 317
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