The Arch of Dativius Victor is one of the most important reconstructed Roman monuments in Germany. The original arch is now on display at Mainz State Museum and the structure at Ernst-Ludwig-Platz is a replica.
The 43 cut stones were discovered during construction work at the turn of the 20th century. Archaeologists believe that there were originally 75 such blocks, which means that only about a third of the arch has survived. It appears that some of the stones were already "recycled" at Roman times for the construction of a new wall.