Archbishop Daniel Brendel von Homburg built office buildings and St Gangolph's Church around the year 1580.

[1] Delays were due not only to the War of the Grand Alliance, but also to the extensive building activity of the nobility: for example, the Lustschloss Favorite begun in 1700 by Lothar Franz von Schönborn absorbed large amounts of resources.

On 23 October 1792, the Jacobin Club, a political group during the French Revolution, was established on what nowadays is German soil.

His successor Karl Theodor von Dalberg was both Archbishop-Elector of Mainz and Arch-Chancellor of the remaining Empire on the right bank of the Rhine.

During World War II, the building was heavily damaged, especially in the air raid of 27 February 1945, which destroyed most of the city.

The most spectacular interiors included the Grand Staircase by the leading Baroque architect Balthasar Neumann, which was removed during the French occupation.

An assortment of replicas and valuable original items presents a comprehensive picture of the cultural life of prehistoric times, of the Roman Empire, and of the early Middle Ages.