a French painter, printmaker, draughtsman, caricaturist and illustrator whose immersion in the life of Paris in the late 19th century allowed him to produce provocative images of those times.

a Scottish chemist who discovered the noble gases and received the Nobel Prize in Chemistry in 1904 "in recognition of his services in the discovery of the inert gaseous elements in air"

a German mathematician. Skilled in applied mathematics, he trained German army officers in ballistics

a Portuguese neurologist and the developer of cerebral angiography. He is regarded as one of the founders of modern psychosurgery,

a French painter, the last holder of the post of Premier peintre du Roi, serving from 1789 to 1791

a Polish poet, dramatist, essayist, publicist, translator and political activist. He is regarded as national poet in Poland, Lithuania and Belarus.