I live here! No way. Such a great city. The current cathedral was moved within the walls by the normans , supplanting the role of St John’s, which is beside the roman amphitheatre outside the walls and has been since 689. The older parts of the St John’s building likely incorporate stone from the roman amphitheatre having used it as a quarry.
The oldest arches inside chester cathedral are allegedly roman arches, taken from an unknown location in the roman ruins of the city.