Wilhelm Richard Wagner was a German composer of the 1800’s.
Wagner was renowned for his operas, later known as “music dramas”. One such opera called “Tristan” was first performed in 1865.
“Tristan” has established an elite position in musical history having been described as "fifty years ahead of its time" because of its chromaticism, long-held discords, unusual orchestral colouring and harmony, and use of polyphony.
Wagner himself felt that his musico-dramatical theories were most perfectly realized in “Tristan” due to the entire opera coming to him in a dream. He once wrote to a friend with respect to the opera: "For once you are going to hear a dream. I dreamed all this [“Tristan”]. Never could my poor head have invented such a thing purposely."