1861 ilinin fevral ayında kim doğulub

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

Bulgarian ruler from 1887 to 1918 who modernized the nation, achieved independence, and was also a recognized zoologist, ornithologist, and writer

English mathematician and philosopher who created process philosophy, influencing fields from ecology to economics

Swiss physicist known for discovering invar and elinvar alloys, vital for precision instruments and timekeeping