The point of this is that Mozart, a Salzburg boy and well travelled within Europe, only lived in Vienna for a brief few years of his short life. However, the Vienna tourist board, not wanting to miss a trick, have adopted Wolfgang Amadeus Mozart, as their own. Therefore, as you can see, he's bloody everywhere and on everything !!
Good marketing I suppose, but a bit irritating after a short while.
Incidently, he was baptised as Johannes Chrysostomus Wolfgangus Theophilus Mozart and wrote over 600 works in his short but eventful life. He died penniless at the age of 35 !