Being the oldest city in Belgium, Tongeren harbors the remains from the Roman up to the late medieval city. Throughout the twentieth century the municipality made efforts to study and valorize this heritage. To this purpose, traditional ways of presentation and education were used.
With the start of the new century the town has committed to invest in more dynamic state of the art ways of presenting this heritage. See for example the renewal of the Gallo-Roman Museum, the archeological site beneath the church of Our Lady and the renewal of the treasury of the church of Our Lady (both incorporated within the Teseum).