a Russian author of science fiction, philosophy, literary criticism, and political satire.

a German theatre practitioner, playwright, and poet

a Swedish playwright, novelist, poet, essayist and painter

a Dutch mathematician and philosopher, who worked in topology, set theory, measure theory and complex analysis. Regarded as one of the greatest mathematicians of the 20th century

a Spanish essayist, novelist, poet, playwright, philosopher, professor of Greek and Classics, and later rector at the University of Salamanca

a German astronomer remembered for his work on sunspots