von Eppstein (died 1249) was archbishop of Mainz
from 1230 to 1249. He in 1244 granted freedom to the citizens of Mainz
, who subsequently could run their affairs more independently though their own council.; in law it remained an episcopal city.
He acted as regent for Conrad IV of Germany, while the Emperor Frederick II was campaigning in Italy, 1237 to 1242. He was though a supporter of Pope Innocent IV. He held a major synod in 1239.
He added Lorsch Abbey to the archbishopric.