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Encyclopedist, mathematician, philosopher, and mystic Ramón Llull (c. 1235-1316)

From the Kingdom of Majorca on the east coast of Spain. Copperplate engraving, sixteenth or seventeenth century. (Source: Dibner Library of the History of Science and Technology, Smithsonian Institution, Washington, D.C. See: Lanska DJ. Representations of the olfactory bulb and tracts in images of the medieval cell doctrine. J Hist Neurosci 2022b;31[2-3]:176-99. Public domain.)

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