The scientific merits of one of Europe’s greatest mathematicians were perfectly described by his colleagues: “Chebyshev’s works bear an imprint of genius. He invented new methods to address a variety of challenging problems that had been posed long ago and remained unsolved.” A fun fact: the founder of the St. Petersburg Scientific Mathematical School frightened Paris fashion designers deadly. He gave them a lecture on how mathematics can help model clothing and for simplicity suggested that the human body be considered to be ball-shaped.