Brünnhilde the valkyrie.
Illustration to Richard Wagner's Die Walküre.

http://www.artpassions.net/cgi-bin/rackham.pl?../galleries/rackham/ring/ring22.jpg

Overwritten with a copy from the Dover Sampler: temporary link [1]

Originally the image was published in the following book:

• Wagner, Richard (translated by Margaret Amour) (1910). The Rhinegold and the Valkyrie. London:William Heinemann, New York: Doubleday, Page 102.