Latin: Avempace. Ibn Bājja, was in the forefront of the 12th-c Andalusian movement to criticize and replace Ptolemaic astronomy based upon Aristotelian principles. In addition to astronomy, he was also active in mathematics, botany, pharmacology, and medicine.  Ibn Bājja learned in an environment that was deeply influenced by the patronage of the court; under their protection, Saragossa became an important center of both philosophical and mathematical studies. He was imprisoned for several months, and circa 1117 he left Saragossa and his life became a long pilgrimage that took him to several cities in Muslim Spain and North Africa —Xàtiva, Almeria Granada, Oran, and perhaps Seville —though he never settled. It appears that he spent the last period of his life far from the court, occupied in his intellectual work and earning a living as a physician. [BEA, Forcada]