Cartesius / Janus Films ; Istituto Luce (Roma) ; producer, Renzo Rossellini ; screenplay and dialogue by Roberto Rossellini, Luciano Scaffa, Marcella Mariani ; director, Roberto Rossellini.

René Descartes was known as the "Father of modern philosophy." Depicts the seventeenth-century thinker's agonized struggle to assert the primacy of reason. An intimate, psychological study of obsession and existential crisis.