A mix of photos and posters from Wagner operas, and Fritz Lang cinematography. Have to admit, I have a weak spot for these old interpretations of Germanic costumes and aesthetics, no matter how inaccurate they may be.
To watch the 1924 movie Die Nibelungen: Siegfried by Fritz Lang, is even today an uplifting experience. Preferably enjoyed over a glass or two of white wine. That’s about as decadent you can get without even feeling ashamed of yourself. If you wish to try it out, it seems you can watch the complete movie online here: http://dai.ly/frmzyr. You’ll have to buy the wine yourself though.