Johannes Argyropulos, one of the principal revivers of Greek learning in the 15th century, born in Constantinople about 1415, died in Rome, where he held a professorship of philosophy, about 1486. He was instructor in Greek to the son and grandson of Cosmo . de' Medici at Florence, whence he removed to Rome. His principal works are some Latin translations of Aristotle. He was strongly prejudiced against the Roman writers, and declared Cicero to have been alike ignorant of Greek and of philosophy.