Abstract
This article describes the history of the nosology of anxiety disorders. Greek and Latin physicians and philosophers distinguished anxiety from other types of negative affect, and identified it as a medical disorder. Ancient Epicurean and Stoic philosophers suggested techniques to reach an anxiety-free state of mind that are reminiscent of modern cognitive psychology. Between classical antiquity and the late 19(th) century there was a long interval during which anxiety was not classified as a separate illness. However, typical cases of anxiety disorders kept being reported, even if under different names. In the 17(th) century, Robert Burton described anxiety in The Anatomy of Melancholy. Panic attacks and generalized anxiety disorder may be recognized in the "panophobias" in the nosology published by Boissier de Sauvages in the 18(th) century. Also, anxiety symptoms were an important component of new disease constructs, culminating in neurasthenia in the 19(th) century. Emil Kraepelin devoted much attention to the possible presence of severe anxiety in manic-depressive illness, thereby anticipating the "anxious distress" specifier of bipolar disorders in DSM-5. A pitfall to consider is that the meaning of common medical terms, such as melancholia, evolves according to places and epochs.