[Ludwig II of Bavaria: schizotypal personality disorder and frontotemporal dementia?].

Ludwig 2nd, dream-king of Bavaria, has been the subject of medical speculation even during his life and he still is today. Documents from the Secret Archive of the Bavarian State and more widely available information do not support a diagnosis of schizophrenia, but correspond with contemporary criteria for a schizotypal personality disorder. Ludwig's behavioural deterioration during the last months of his life and autopsy findings may indicate incipient frontotemporal degeneration.