Iran Embassy:
Preservation Today
Since the 1970s, the embassy sits abandoned along the iconic Embassy Row. As international land, there is very little that D.C. can do with the building or risk international discourse on U.S. embassy buildings. However, there is some activity at the embassy as the grass is still mowed and very basic cleaning is given to the building.
A glimpse into the Iranian Embassy in Washington, closed since 1980 (thenationalnews.com)
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Iran's govt buildings in DC are vacant. But they're full of stories. | The World from PRX
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US is protecting former Iranian embassy building in DC - The Jerusalem Post (jpost.com)
$12 Million Iranian Embassy Is Empty, but the U.S. Cuts the Grass - The New York Times (nytimes.com)
Congressmen Pay A Visit to the Iranian Interest Section | Washington Examiner