Located under the St Lambert square, the Archéoforum played a crucial role in the history of the city. During the first and second centuries of our era, a Gallo-Roman villa was built on the prehistoric site where, in the year 700, Bishop Lambert was murdered. This marked a turning point as a cult around his martyrdom raised thousands of pilgrims to make their way to the city of Liège, prompting for the construction of a cathedral. This cathedral grew to be one of the tallest gothic churches of Europe, before being demolished during the Liegian Revolution at the end of the 18th century.