A wide range of specialists provide a comprehensive overview of the reception of Pythagorean ideas in the Middle Ages and the Renaissance, shedding new light especially on the understudied 'Medieval Pythagoras' of the Latin West. They also explore the survival of Pythagoreanism in the Arabic, Jewish, and Persian cultures, thus adopting a multicultural perspective. Their common concern is to detect the sources of this reception, and to follow their circulation in diverse linguistic areas. The reader can thus have a panoramic view of the major themes belonging to the Pythagorean heritage - number philosophy and the sciences of the quadrivium; ethics and way of life; theology, metaphysics and the soul - until the Early Modern times.

The purpose of the conference "On Pythagoreanism", held in Brasilia in 2011, was to bring together leading scholars from all over the world to define the status quaestionis for the ever-increasing interest and research on Pythagoreanism in the 21st century. The papers included in this volume exemplify the variety of topics and approaches now being used to understand the polyhedral image of one of the most fascinating and long-lasting intellectual phenomena in Western history. Cornelli's paper opens the volume by charting the course of Pythagorean studies over the past two centuries. The remaining contributions range chronologically from Pythagoras and the early Pythagoreans of the archaic period (6th-5th centuries BCE) through the classical, hellenistic and late antique periods, to the eighteenth century. Thematically they treat the connections of Pythagoreanism with Orphism and religion, with mathematics, metaphysics and epistemology and with politics and the Pythagorean way of life.