Gerbert d’Aurillac died in Rome. He was elected to the papacy on April 2, 999, taking the name Pope Sylvester II. He was one of the most interesting scientific and humanistic figures of the High Middle Ages. Gerbert founded schools in Italy, Germany, and France, promoting classical studies along with the quadrivium (arithmetic, geometry, astronomy, and music). He authored works in mathematics, geometry, and astronomy and in the West introduced the use of the numeral zero in mathematics. Hydraulics and designing musical instruments were two other interests of his. After he was elected pope, he instituted a large number of libraries with the goal of preserving and diffusing the greatest classical Latin manuscripts.