3414 Volta Place, NW
I haven’t passed by this one in years. I forgot how awesome it is. Officially this is the Volta Laboratory and Bureau:
The current building, a U.S. National Historic Landmark, was constructed in 1893 under the direction of Alexander Graham Bell to serve as a center of information for deaf and hard of hearing persons. Bell, best known for receiving the first telephone patent in 1876, was also a prominent figure of his generation in the education of the deaf. His grandfather, father and elder brother were teachers of speech and the younger Bell worked with them.