Civil law developed in Europe during the middle age, about the same time common law developed in England. During the Renaissance, England's common law system borrowed from civil law. While the common law was the traditional law system in England by this time, Equity is based on civil law. Other features were borrowed and used in maritime law and in wills, trusts and estates. The Napoleonic Code, which borrowed much from Roman law, influenced many of the legal systems in Europe and was the foundation for Prussian civil law.