Cistern: As seen in this stitched-together image, the pipes poking through the cistern wall look almost modern and just as ready to pour fresh springwater as they were 1,650 years ago. (Note the Roman arch.) At least 80 meters long, the cistern was entirely constructed from bricks stamped with the name of Constantine or his sons Constantine II and Konstans, which have mostly been discovered at imperial sites like Hagia Sophia... Steven Bartoo