Not 10 square miles. 10 miles square, which is to say, 10 miles on a side, making 100 square miles.
The original district went about 4 miles into Virginia. That ended during the Civil War, I would imagine.
If you look at the southern and western borders of Arlinton, VA, they complete the square.
Yes. I got corrected by a couple others.
Now my original assertion, that it would be completely 100% unconstitutional to grant DC statehood.
I’m on pretty firm ground there right?
I would guess that the eastern part of Alexandria (which includes the older neighborhoods) was also part of the District of Columbia until 1846.