The notion and understanding of law penetrated society in Ancient Rome to a degree unparalleled in modern times. The poet Juvenal, for instance, described the virtuous man as a good soldier, faithful guardian, incorruptible judge and honest witness. This book is concerned with four central questions: Who made the law? Where did a Roman go to discover what the law was? How has the law survived to be known to us today? And what procedures were there for putting the law into effect? In this volume the origins of law and their relative weight are described in the light of developing Roman history. This is a text that may appeal to a wide range of readers: the law student for the study of the substantive law, and the student of history for a guide to what Roman law means as well as its value for the understanding and interpretation of Roman history.