Ok it's the Hitlon and it is well located. But be warned, there is no free Wifi in the rooms, they charge 10 euros/day for a slow internet connection and 24 euros/day for fast connection. Sure it says in the fine print that they provide free internet in common areas but years ago one would read the small print regarding the internet connection in a hotel. Now most hotels provide this for free, just like heating, water e.t.c. When asked the staff told me this was company policy ... well my policy in this instance is to use my mobile, 4G works well in Vienna.