Question: When was the university which has Placidus Böcken as  Vice-Chancellor established? 
Sentence (from "Placidus Böcken"): Placidus Böcken (or Böckhn) (13 July 1690 – 9 February 1752) was a German Benedictine canon lawyer, and Vice-Chancellor of the University of Salzburg.
Relevant evidence: Yes