Vienna’s Tourist Board has also been working on a campaign celebrating these and other big-draw exhibitions, and Viennese modernism in general. But the campaign ran into an unusual glitch — the office’s originally planned posters, featuring large Schiele nudes, turned out to be too racy.

According to a Vienna Tourist Board spokeswoman, Helena Hartlauer, Transport for London rejected the original images, citing trepidation about depicting genitals in public space.

Ms. Hartlauer said that modified advertisements with pixelated genitals were also declined. Ultimately approved were versions using the same artworks (Schiele’s “Seated Male Nude (Self-Portrait),” 1910, and “Girl With Orange Stockings,” 1914, and other paintings by the artist, all from the Leopold Museum collection), but with certain bits covered by a banner.

The banner reads: “SORRY, 100 years old but still too daring today.” The modified images are now on view on bus shelters in Cologne and building facades in Hamburg, and, since this week, in tube stops in London.

“We wondered, How much Viennese modernism is bearable today?” said Norbert Kettner, chief executive of the Vienna Tourist Board. Apparently for the British and Germans, less than the Austrians anticipated.