Abu Ali al-Hasan al-Marrakushi

Abu Ali al-Hassan al-Marrakushi was a Maghreb astronomer and mathematician from the Kingdom of Morocco. He was especially important in the field of trigonometry and practical astronomy. He wrote Jāmiʿ al-mabādiʾ wa’l-ghāyāt fī ʿilm al-mīqāt, a treatise on spherical astronomy and astronomical instruments. The first part was translated into French by the orientalist and astronomer Jean Jacques Emmanuel Sédillot during the early 19th century, and published after Sédillot's death.