Events By Topic Art Repairs are made in Hagia Sophia. Education Sankore University's founded in Timbuktu. Astronomy September — Halley's Comet's at perihelion. Births Adémar de Chabannes, monk and historian (d. 1034) Gisela of Swabia, Holy Roman Empress (d. 1043) Fan Zhongyan, politician, chancellor, and writer in Song Dynasty China (d. 1052) Deaths 6 September — Sharaf al-Daula, emir of Kerman and Fars… (More on 989)