Best Answer: St. Augustine (Florida) is the oldest continually occupied European settlement in the continental United States, only San Juan, Puerto Rico predates the city as the oldest settlement within the territory of the United States.
Finally in 1980 the American Psychiatric Association officially recognized multiple personality disorder as a genuine emotional illness. Today, MPD is a relatively popular diagnosis with 20,000 cases recorded between 1980 and 1990. Researchers currently believe that from 0.01-10% of the general population has this mental illness.
Definition. Previously known as multiple personality disorder, dissociative identity disorder (DID) is a condition in which a person has more than one distinct identity or personality state. At least two of these personalities repeatedly assert themselves to control the affected person's behavior.