Siegfried III von Eppstein, archbishop of Mainz…
1244 CE
Siegfried III von Eppstein, archbishop of Mainz from 1230, makes Mainz a free city in 1244.
The citizens of Mainz can now run their affairs more independently though their own council; in law, Mainz remains an episcopal city.
It will soon become the center of a powerful league of Rhenish towns.