Sigmund Freud was born on May 6, 1856, in Freiberg, Moravia, which is now part of the Czech Republic.¹⁾

He was the firstborn of eight children in his family.²⁾

Freud's original name was Sigismund Schlomo Freud, but he later changed it to Sigmund.³⁾

He studied medicine at the University of Vienna, graduating in 1881.⁴⁾

Freud initially trained as a neurologist and worked at Vienna General Hospital.⁵⁾

He conducted research on the nervous system and published several influential papers on neurology.⁶⁾

Freud developed the idea that unconscious thoughts and desires influence human behavior, leading to the creation of psychoanalysis.⁷⁾

His work on the interpretation of dreams, published in 1899, is considered one of his most important and influential writings.⁸⁾

Freud proposed the existence of three levels of consciousness: conscious, preconscious, and unconscious.⁹⁾

He introduced the concept of the “id,” “ego,” and “superego” as components of the human psyche.¹⁰⁾

Freud believed that dreams were a window into the unconscious mind and could reveal repressed desires and conflicts.¹¹⁾

He popularized the idea of the Oedipus complex, which suggests that boys have unconscious sexual desires for their mothers and rivalry with their fathers.¹²⁾

Freud's clinical practice included the use of techniques such as free association, where patients would express thoughts and feelings without censorship.¹³⁾

He emphasized the role of sexuality in human development and behavior.¹⁴⁾

Freud proposed that personality is formed during childhood through a series of psychosexual stages: oral, anal, phallic, latent, and genital.¹⁵⁾