Gottfried Leibniz was a German philosopher and mathematician who co-developed calculus and shaped modern philosophy with his rationalist ideas.
Birbal Sahni was a renowned Indian botanist and paleobotanist, known for his pioneering work in the field of plant fossils and their evolution.
Grigori Rasputin was a Russian mystic and self-proclaimed holy man who greatly influenced the royal court during the reign of Tsar Nicholas II.
Robert Dudley was an English nobleman and courtier, serving as a close confidant to Queen Elizabeth I and a prominent figure in Elizabethan politics.