The art noveau restroom at the "Graben"
Dome of St. Charles church
Zaha Hadid - library at the Vienna University of Economics -Campus
Memorial for the victims of Nazi military justice at the Ballhausplatz
No idea: you are quite sure a Viennese ......... *smile*
Recognized one: been around a lot ......
Recognized two: better half knowledge than none.....
Recognized three: you are probably not a Viennese ?
Recognized four: you certainly are'nt a Viennese !
In case you are, then I suggest to become an Austrian Tourist Guide !!