Compendium Mathematicum

Michael Psellus (1017/1018 to 1078) was a Byzantine Greek monk, savant, writer, philosopher, politician and historian. The main source of information about Psellos' life comes from his own works, which contain extensive autobiographical passages. Michael Psellos was probably born in Constantinople. His family hailed from Nicomedia and, according to his own testimony, counted members of the consular and patrician elite among its ancestors. His baptismal name was Constantine; Michael was the monastic name he chose when he entered a monastery later in life. Psellos ('the stammerer') probably was a personal by-name referring to a speech defect.Michael Psellos was educated in Constantinople. At around the age of ten, he was sent to work outside the capital as a secretary of a provincial judge, in order to help his family raise the dowry for his sister. When his sister died, he gave up that position and returned to Constantinople to resume his studies. While studying under John Mauropus, he met the later Patriarchs Constantine Leichoudes and John Xiphilinos, and the later emperor Constantine X Doukas. For some time, he worked in the provinces again, now serving as a judge himself. Some time before 1042 he returned again to Constantinople, where he got a junior position at court as a secretary in the imperial chancellery. From there he began a rapid court career. He became an influential political advisor to emperor Constantine IX Monomachos (reigned 1042-1055). During the same time, he became the leading professor at the University of Constantinople, bearing the honorary title of Chief of the Philosophers.