In the Medieval times, barbers-surgeons roamed
the countryside offering a surgery for removing the "stone of madness"
or "pierre de follie", which supposedly
existed inside the skulls of mentally deranged people.
Scala / Art Resource: Removal of the Stone of
Folly Hieronymus Bosh, Prado, Madri
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Estadual de Campinas
Uma realização: Núcleo
de Informática Biomédica