Truman Osborn Angell (June 5, 1810 – October 16, 1887) was an American architect who served many years as the official architect of The Church of Jesus Christ of Latter-day Saints (LDS Church). The brother-in-law of Brigham Young, he was a member of the vanguard company of Mormon pioneers that entered the Salt Lake Valley on July 24, 1847.
He designed many of the great and classic buildings in Utah including:
- The Salt Lake Temple.
- The Lion House.
- The Beehive House.
- The Utah Territorial Statehouse
- The St. George Utah Temple.
- The Summit Stake Tabernacle
- The Fort in Santaquin
- The Provo Tabernacle.
- The Council House.
Angell’s modifications to the Salt Lake Tabernacle are credited with perfecting the acoustics for which the building is famous.