A D.C. Building Mystery

What Do You Think You're Looking At? #47

I saw a thread about this old building in Washington, D.C. on Twitter the other day, and it was too good not to share as an entry in this series. Unfortunately, the building in question is no longer standing—the whole block was torn down when one of the convention centers was built (I believe the first one, in the 1980s, but I’m not positive.)

Here’s how…