I found this link about King David’s tomb which I think is even more interesting than the fortress.
It has lots of good drawings of the arecheological dig and pictures as well. Might be good for its own posting on GGG.
It doesn’t seem to have been posted, so, anyway, thanks, good idea!
https://www.google.com/search?q=King+Davids+Tomb+site%3Afreerepublic.com