Ernest Frederick, Margrave of Baden Durlach
Ernest Frederick of BadenDurlach ruled the northern part of the Margraviate of BadenDurlach. He came to power when he came of age in 1584. He founded the first Gymnasium Illustrie in the margraviate. His conversion from the Lutheranism to Calvinism and his occupation of Upper Baden caused serious conflicts even with the Emperor the consequences of which damaged Lower Baden and ultimately also led to losses of territory.
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Source: Wikipedia