BIBLE HISTORY DAILY: Nehemiah—The Man Behind the Wall (Dorothy Willette). This essay was first published some time ago and has just been republished. The republication says the original came out in 2012, but I had a link to it (now rotted) back in 2009. In any case, there's been interest (cf. here) in Nehemiah and his wall recently, so here it is again.
Ten years ago there were reports that remains of Nehemiah's wall have been discovered. But this was disputed. See the posts here, here, here, and here.