Stephansplatz
From Tardis Wiki, the free Doctor Who reference
Stephansplatz was a central square in Vienna, Austria.
It was the destination of Leopold Krauss when he was murdered in September 1873. It was also the location of Stephansdom, to which Mary Shelley brought the Cybermen Bremm and Gramm. The Eighth Doctor and Alfred Stahlbaum arrived there shortly thereafter in search of Mary. (AUDIO: The Silver Turk)