The Archéoforum is an archaeological museum inaugurated in 2003. It allows visitors to discover the history of Place Saint-Lambert, from the Mesolithic era to the present day. The sub-soil of the square contains remains of previous occupiers: prehistorical traces, the walls of a Gallo-Roman villa and the ruins of medieval buildings including the Romanesque and Gothic cathedrals.
During school days (Fédération Wallonie-Bruxelles) :Monday : closed.Tuesday : 09 am - 5 pm.Wednesday : 09 am - 5 pm.Thursday : 09 am - 5 pm.Friday : 09 am - 5 pm.Saturday : 10 am - 5 pm.Sunday :closed.During non-school days (Fédération Wallonie-Bruxelles) :Monday : closed.Tuesday : 10 am - 5 pm.Wednesday : 10 am - 5 pm.Thursday : 10 am - 5 pm.Friday : 10 am - 5 pm.Saturday : 10 am - 5 pm.Sunday : closed..Closed on public holidays and on 2nd January, 27th September, 2nd and 15th November and 26thDecember.