Karlskirche

Vienna’s most conceptually ambitious church was built not from devotion but from a plague vow. In 1713, Emperor Charles VI promised a church to Saint Charles Borromeo if the epidemic ended; what he got was the Karlskirche, a building designed by Johann Bernhard Fischer von Erlach to fuse Greek, Roman, Byzantine, and Baroque elements into a single argument for Habsburg supremacy. The twin columns outside copy Rome’s Trajan’s Column but retell a saint’s life. Inside, a panoramic lift takes you face-to-face with Johann Michael Rottmayr’s dome frescoes, one of the few places in Europe where Baroque ceiling painting is legible at eye level. Open Monday to Saturday from 09:00, Sunday from 12:00; admission EUR 8 including the lift. Combine with the nearby Imperial Crypt for a full afternoon on the imperial Vienna trail.