WIEN.- The Secession begins a new season with “The Fifth Column,” a group exhibition featuring work by seven international artists from three generations. They include: Welsh artist Cerith Wyn Evans, who presented the new safety curtain at the Vienna State Opera in the fall of 2011; Spanish artist Dora Garcia whose pavilion “The Inadequate” at this year’s Venice Biennial divided critical opinion; and Peter Downsbrough, an American conceptual artist of the first generation, whose work has only recently begun to receive the attention its deserves. With the deliberately enigmatic title “The Fifth Column”, the show’s curator, Barcelona-based Swiss Moritz Küng, alludes to the complete renovation of the Secession in 1986, and more specifically to the four central columns of the Hauptraum designed by architect Adolf Krischanitz. Originally, they were clad in chrome steel and brass, but