The history of law is connected with general history, history of religion, history of specific regions and, for example, with economic history. The knowledge of history contributes to our understanding of processes that happened in the past. The codification which is valid nowadays in Europe is the result of a long process of development during the history. For this reason, it is important to study the sources that have lead to the development of the valid law. The main task is to chart in details the history of law in separate European countries. It is necessary to emphasize the influences which were most important for the decision making process (influence of Roman law, natural laws, important codifications such as the French Code Civil, the German Civil Code BGB or the Austrian ABGB and etc.).