The section of the wall has been revealed outside the Mining Institute on Westgate Road.
It was reportedly last seen during an excavation on the site in 1952.
But Simon Brooks, acting general manager of the Mining Institute, said: “There was some controversy about whether the Wall had been found. A lot of people were sceptical but now we have proof positive and we are delighted.”
Story: Tony Henderson, ChronicleLive | Photo: Newcastle Chronicle