The Grand Arcade site in Wigan is hosting an open day on Saturday for people to view remains found during recent archaeological work there.
A sequence of remains have been uncovered, which date from Roman, Medieval and later periods.
The Roman remains are particularly significant, as they provide detailed evidence of the nature of the Roman occupation of Wigan.
Little is known about Roman Wigan, known in Roman literature as Coccium.
A team from Oxford Archaeology will be on hand to guide the public through the findings, with information boards available showing the history of the site and interpretations of the remains.
The public will also have a chance to view some of the excavated material from 1100 BST onwards.