Austrian philosopher, esotericist, and social reformer who founded anthroposophy and contributed as a writer, teacher, and architect

French astronomer, prolific author of popular science and early science fiction, and founder of L'Astronomie magazine

German philosopher, logician, and mathematician known as the father of analytic philosophy and a profound philosopher of mathematics

French composer and pianist known for his influential solo piano works like Gymnopédies and Gnossiennes, contributing to classical and modern classical genres