One of his noteworthy creations was the 1899 Karlsplatz Stadtbahn Station in Vienna -- the Stadtbahn being the municipal railway system.
Ten years or so ago when I was visiting Vienna, I noticed a poster dealing with the Karlsplatz station building in a display window. I continued walking for a short distance, but then turned back to the shop because I felt I had to have that poster (and I almost never buy posters).
I know nothing about the poster's origin. It incorporates elements of architectural presentations, but might possibly be a presentation in itself created by Wagner's firm.
Here it is: click on the images to enlarge.