Edmund Husserl (1859–1938), the founding figure of the philosophical movement known as phenomenology, was born in Prossnitz in Mähren, then part of the Hapsburg Austro-Hungarian Empire but now Prostějow in Moravia in the Czech Republic. Husserl studied astronomy at Leipzig from 1876 to 1878 and mathematics in Berlin from mid-1878 to 1881 under the eminent mathematicians Karl Weierstrass (1815–1897) and Leopold Kronecker (1823–1891). Husserl completed his mathematical training in Vienna, receiving the PhD in January of 1883, and while completing his degree, he attended the philosophy lectures of Franz Brentano (1838–1917). Husserl went back to Berlin briefly for further study with Weierstrass, but soon returned to Vienna to study philosophy again with Brentano from 1884 to 1886. At Brentano's suggestion, Husserl studied with Carl Stumpf (1849–1936) at the university at Halle, where in 1887 he submitted a Habilitationsschrift titled "Über den Begriff der Zahl. Psychologische Analysen." Husserl taught at Halle from 1887 to 1901, at G...