Between 1915 and 1917, Sigmund Freud delivered a series of well-received lectures at the University of Vienna on his theories of psychoanalysis. Nine of them focused on Freud's theories about dreams-what they are and what they mean. The content of these lectures are presented in Dreams. Freud covered a lot of ground in his lectures, focusing first on the general difficulties involved in studying dreams, then on the many aspects of dream interpretation, specific symbols and examples of dreams, and the dream as a wish-fulfillment. Finally, he addresses the doubts and criticisms commonly expressed about his theories.