When was the university which has Placidus Böcken as  Vice-Chancellor established? 
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. University of Salzburg:  Established in 1622, the university was closed in 1810 and re-established in 1962.
1622