In this high-end grocery shop you find deli products from Austria, as well as from all over the world. Worth visiting. You may also eat something small here, or a sweet, and there is a wine bar in the basement (stairs from inside the grocery shop, as well as from the side street).
Prices are not low, but you get what you pay for.
At “Graben” within the pedestrian area, on short walking distance from The Stephansplatz.