On this occasion, Alexander Van der Bellen (President of Austria) presents the rings of honor of the Republic of Austria to four outstanding graduates as part of a "Promotio sub auspiciis Praesidentis rei publicae" together with Rector Heinz W. Engl. The University of Vienna also honors the French chemist and Nobel Prize winner Jean-Marie Lehn with an honorary doctorate and then invites to the Science Talk with ERC Prize winners and Marie Curie Fellows.
