 He urged on the Emperor the need to enforce the Edict of Worms, and at several diets was prominent among the enemies of the Reformers.A patron of learning, Joachim Nestor established the Viadrina university of Frankfurt (Oder) in 1506.He promoted Georg von Blumenthal, the "Pillar of Catholicism", as Chancellor of Frankfurt University, Bishop of Lebus and a Privy Counsellor.