It is indeed the Mormon Tabernacle. That's the Angel Moroni on the tippy-tip-top. (Used to be, as you approached it heading west on the Beltway, you would see painted on a railway overpass the words "SURRENDER DOROTHY" -- but they've been whitewashed over by some humorless guardian of public sanctity.)
Interesting!
I never would of guessed it was mormon!
Thanks
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