Part I The Theories on the Motion of Bodies in the Classical Antiquity.- Kinematics among the Greeks.- Dynamics in the Opinion of Aristotle and his Continuators.- The Theories of Motion in the Middle Ages and in the Renaissance.- The first substantial Criticisms to Aristotelian Mechanics - Philoponus and Avempace.- The medieval Kinematics.- Part II A brief Chronology of Galileo's Life.- The young Galileo and the De Motu.- The Inertia Principle.-The...