 He was three times rector at Jena before he was called by the elector Frederick III, in 1694, as professor and provisional rector to the new university of Halle.Here his devotion to strict orthodoxy brought him into conflict with some of his colleagues, and the pietistic movement also gave him trouble, so that after a year he was glad to accept the combined positions of chief court preacher, superintendent, and pastor at Weimar — which, however, he held only a few months until his death.He left a name in the history of theology, especially by his dogmatic compendium, which still preserves the early Protestant traditions among High Lutherans, especially in America.