John Frederick I was a nephew of Frederick III. Known as the "Champion of the Reformation," John Frederick I not only followed Luther's teachings, but also the two developed a friendship. Under his leadership, many people in his lands converted to the Protestant faith. John Frederick I was captured and imprisoned near the end of his life by Catholic Emperor Charles V. Yet, even when offered release in exchange for compromise, he never wavered in his commitment to the Protestant faith.

Reformers