Ernestine duchies
It was Frederick the Wise who set up the University of Wittenberg in 1502.  This was because the only university in Saxony was in Leipzig, was in the part of Saxony controlled by the descendants of his uncle, Albert.  The University of Wittenberg was were Martin Luther posted his 95 Theses. Frederick protected Luther, and did not send him to Rome for trial. Frederick allowed Lutheran reforms in his country.