sentences:  Although public opinion was originally skeptical about the combination of the mediaeval cathedral and the glass and steel building, it is now considered an example of how old and new architecture can mix harmoniously .The "Stock-im-Eisen" ("staff in iron") is located at the corner of Kärntner Straße and Graben in a niche on the corner of the Palais Equitable.It is a section of tree trunk into which hundreds of nails have been hammered since the Middle Ages, and which is ringed by an iron band closed by a large padlock.