 Historically, depth psychology from the German term Typhensychology was coined by Eugen Blüller to refer to psychoanalytic approaches to therapy and research which take the unconscious into account. The term was rapidly accepted in the year of its proposal 1914 by Sigmund Freud, to cover a topographical view of the mind in terms of different psychic systems. Depth psychology is since come to refer to the ongoing development of theories and therapies pioneered by Pierre Janet, William James, and Carl Eugen as well as Freud, which explored the relationship between the conscious and the unconscious thus including both psychoanalysis and Eugen psychology.