Consequently, neither of the two waves of Roman influence completely dominated in Europe. Roman law was a secondary source that was applied only when local customs and laws were found lacking on a certain subject. However, after a time, even local law came to be interpreted and evaluated primarily on the basis of Roman law, since it was a common European legal tradition of sorts, and thereby in turn influenced the main source of law. Eventually, the work of civilian glossators and commentators led to the development of a common body of law and writing about law, a common legal language, and a common method of teaching and scholarship, all termed the jus commune, or law common to Europe, which consolidated canon law and Roman law, and to some extent, feudal law. Codification An important common characteristic of civil law, aside from its origins in Roman law, is the comprehensive codification of received Roman law, i.e., its inclusion in civil codes. The earliest codification known is the Code of Hammurabi, written in ancient Babylon during the 18th century BC. However, this, and many of the codes that followed, were mainly lists of civil and criminal wrongs and their punishments. The codification typical of modern civilian systems did not first appear until the Justinian Code. Germanic codes appeared over the 6th and 7th centuries to clearly delineate the law in force for Germanic privileged classes versus their Roman subjects and regulate those laws according to folk-right. Under feudal law, a number of private custumals were compiled, first under the Norman empire (Très ancien coutumier, 1200–1245), then elsewhere, to record the manorial—and later regional—customs, court decisions, and the legal principles underpinning them. Custumals were commissioned by lords who presided as lay judges over manorial courts in order to inform themselves about the court process. The use of custumals from influential towns soon became commonplace over large areas. In keeping with this, certain monarchs consolidated their kingdoms by attempting to compile custumals that would serve as the law of the land for their realms, as when Charles VII of France in 1454 commissioned an official custumal of Crown law. Two prominent examples include the Coutume de Paris (written 1510; revised 1580), which served as the basis for the Napoleonic Code, and the Sachsenspiegel (c. 1220) of the bishoprics of Magdeburg and Halberstadt which was used in northern Germany, Poland, and the Low Countries.