Johann Friedrich Karl von Ostein, Archbishop-Elector (Mainz Archbishopric) : All Data

Johann Friedrich Karl von Ostein was the Archbishop-Elector of Mainz from 1760 to 1763. During his tenure, he witnessed the outbreak of the Seven Years' War (1756-1763), a conflict that engulfed Europe and involved major powers such as Prussia, Austria, and France. As the ruler of Mainz, von Ostein would have been directly affected by the war, which saw several battles and sieges in the region. His rule coincided with the later years of this devastating war, and he likely faced the challenges of managing the impact of the conflict on his territory and its people.