Leonhard Euler, born in Basel on April 15, 1707, was a Swiss polymath who made groundbreaking contributions to mathematics and science, including graph theory and topology, with his early education at the University of Basel under Johann Bernoulli shaping his career. See wikipedia for more information. Richard von Weizsäcker, born in Stuttgart in 1920, spent part of his childhood in Basel from 1920 to 1924 and later became President of Germany from 1984 to 1994, known for his speeches on Germany's moral responsibility and leadership during reunification. See wikipedia for more information.