Analysis of information sources in references of the Wikipedia article "La Lithotomie" in French language version.
« The logo of the Mind’s Museum is an overturned funnel. It is a reference to a 15th-century painting by Hieronymus Bosch that depicts a doctor using a scalpel to extract an object (the supposed « stone of madness ») from the skull of a patient. The doctor is wearing a funnel as a hat. »