In consequence of these and other views, on 10 May 1690 he was denounced from the pulpits, forbidden to lecture or to write, and his arrest was ordered. He escaped by going to Berlin, and the elector Frederick III offered him a refuge in Halle, with a salary of 500 thaler and permission to lecture. He helped found the University of Halle (1694), where he became second and then first professor of law and (in 1710) rector of the university.