Diagnoses : Psychological : Institutionalized

Anthony "Tony" George Kiritsis (August 13, 1932 – January 28, 2005) was an American kidnapper.
Kiritsis was a resident of Indianapolis, Indiana, and had fallen behind on mortgage payments for a piece of real estate. In early February 1977, when his mortgage broker Richard O. Hall refused to give him additional time to pay, Kiritsis became convinced that Hall and Hall's father wanted the property. The property's value had increased and could be sold at a high profit. Hall claimed that he had proof of this in writing.

Martín Ramírez (January 30, 1895 – February 17, 1963) was a self-taught artist who spent most of his adult life institutionalized in California mental hospitals, diagnosed as a catatonic schizophrenic. He is considered by some to be one of the 20th century's best self-taught masters.

Dino Campana (20 August 1885 – 1 March 1932) was an Italian visionary poet. His fame rests on his only published book of poetry, the Canti Orfici ("Orphic Songs"), as well as his wild and erratic personality, including his ill-fated love affair with Sibilla Aleramo. He is often seen as an Italian example of a poète maudit.

Roberto Succo (3 April 1962 – 23 May 1988) was an Italian serial killer who committed several murders and other violent crimes mostly in Italy and France in the 1980s.