Abū Isḥāq Ibrāhīm ibn Yaḥyā al-Naqqāsh al-Zarqālī al-Tujibi ; also known as Al-Zarkali or Ibn Zarqala (1029–1100), was an Arab maker of astronomical instruments and an astrologer from the western part of the Islamic world. 1027 – 1087; died at about 60. Alive at the same time as William the Conqueror, Anselm of Canterbury, Solomon ibn Gabirol, Judah Halevi, and Avicenna. Wiki link