http://en.wikipedia.org/wiki/Christoph_Willibald_Gluck
http://www.nndb.com/people/288/000093009/
_ Christoph Willibald Gluck - Ouvertüre - Orpheus und Eurydike
http://www.youtube.com/watch?v=Q7vuat-5dv8
_ Christoph Willibald Gluck - Orphee et Eurydice
http://www.youtube.com/watch?v=wjtcguzYuZs