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.
Interestingly, that is the same number of alters purportedly possessed by Shirley Ardell Mason, the woman known as Sybil in the 1973 best-selling book and two made-for-television movies that popularized the diagnosis of multiple personality disorder.