Born c. 950 in Majrit (present-day Madrid), Maslama al-Majriti developed his entire career in Caliphal Córdoba, founding an astronomical and mathematical school whose influence spread through three generations of disciples. His most documented contribution was revising, with disciple Ibn al-Saffar, al-Khwarizmi's astronomical tables (zij), adapting them to Córdoba's meridian — preserved via Adelard of Bath's Latin version. He probably also participated in adapting Ptolemy's Planisphaerium to Arabic, and is (disputedly) credited with the Picatrix.