 During his first year of reign, Johann Ernst still live in Marsuhl because Eisenach, the new capital of his country, was inhabited and, only with the establishment of his official residence the citizens began to moved there.In 1598 Johann Ernst created for his duchy his own "Landesregierung" (State Government) and a "Konsistorium" (Consistory).In 1633 his brother, the duke Johann Casimir of Saxe-Coburg, died childless.