Thanks to Anna's host. The apartment is located in the center of Vienna, surrounded by historical buildings and churches. The room is huge and clean. A bit too big for 1-2 people, should be very suitable for 4. There is lift in the building, so you don't need to carry luggage upstairs. Even though the windows is facing patio, there is fluorescent lamp to light up the window and make the room bright. There are also supermarkets and delicious food just around. Host Anna is very helpful with very clear and useful suggestions. Thank you again!