We had a room with multiple windows onto some kind of inner space/roof. I could see construction material there, so I asked at reception what was going on. I was assured that there was some work going on at another level and that nothing would start until 9am. The next morning I heard lound banging aroung 7am, went to the window and came face to face with a worker. Reception continued to tell me lies, like they would just be loading some material through the hall way windows and then would stop the noise, but that was not true. When we went downstairs for breakfast, we were surprised at how minimal the offerings were, especially for us as we don't eat meat. So we asked for scrambled eggs and were given the most overcooked eggs we have ever had. After we abandoned ship and went to another hotel for our remaining 2 nights in Vienna (BTW, a much nicer hotel with excellent breakfast offerings and a very attentive reception), we returned to the Schlosshotel and found the entire reception area covered with drop cloths as they worked on electrical in the ceiling. In other words, the entire hotel was involved in construction, and we were being charged normal prices for a less than normal experience. There were no apologies. Just an awful experience, but the good news was that leaving there led us to a superior hotel experience for the same price or less.