The Washington D.C. Temple is the 18th constructed and 16th operating temple of The Church of Jesus Christ of Latter-day Saints. It is located in Kensington, Maryland, United States, just north of Washington, D.C., near the Capital Beltway. The temple was dedicated in 1974 after an open house that attracted over 750,000 people, including several international dignitaries. The temple was the first temple built by the church east of the Mississippi River since 1846, when the original Nauvoo Temple was dedicated.
Built at a cost of about $15 million in 1968, the temple is the church's tallest; its easternmost spire is 288 feet tall. Its floor area of 160,000 square feet is the third-largest among church temples. Its design emulates the Salt Lake Temple with six spires, three on each end, and the building is encased in white Alabama marble.
Wikipedia https://en.wikipedia.org/wiki/Washington_D.C._Temple
Official Website http://www.ldschurchtemples.com/washington/
Coordinates 39°0'50.592" N -77°3'56.193" E