Activists of the Greens hold up a mock street name plate 'Universitaetsring' next to an official street name plate 'Dr.-Karl-Lueger-Ring', at a tramway stop in Vienna, April 20, 2012. The street section in front of the university is named after Karl Lueger, who was Vienna's mayor from 1897 until 1910. City autohorities have decided, after a campaign by the Green party, to rename the street 'Universitaetsring' on occasion of the university's upcoming 650th anniversary in 2015 and due to Karl Lueger's anti-Semitic attitude. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: POLITICS)