The concept of codification was further developed during the 17th and 18th centuries AD, as an expression of both natural law and the ideas of the Enlightenment. The political ideals of that era was expressed by the concepts of democracy, protection of property and the rule of law. Those ideals required certainty of law, recorded, uniform law. So, the mix of Roman law and customary and local law gave way to law codification. Also, the notion of a nation-state implied recorded law that would be applicable to that state. There was also a reaction to law codification. The proponents of codification regarded it as conducive to certainty, unity and systematic recording of the law; whereas its opponents claimed that codification would result in the ossification of the law. In the end, despite whatever resistance to codification, the codification of Continental European private laws moved forward. Codifications were completed by Denmark (1687), Sweden (1734), Prussia (1794), France (1804), and Austria (1811). The French codes were imported into areas conquered by Napoleon and later adopted with modifications in Poland (Duchy of Warsaw/Congress Poland; Kodeks cywilny 1806/1825), Louisiana (1807), Canton of Vaud (Switzerland; 1819), the Netherlands (1838), Serbia (1844), Italy and Romania (1865), Portugal (1867) and Spain (1888). Germany (1900), and Switzerland (1912) adopted their own codifications. These codifications were in turn imported into colonies at one time or another by most of these countries. The Swiss version was adopted in Brazil (1916) and Turkey (1926). In theory, codes conceptualized in the civil law system should go beyond the compilation of discrete statutes, and instead state the law in a coherent, and comprehensive piece of legislation, sometimes introducing major reforms or starting anew. In this regard, civil law codes are more similar to the Restatements of the Law, the Uniform Commercial Code (which drew from European inspirations), and the Model Penal Code in the United States. In the United States, U.S. states began codification with New York's 1850 Field Code (laying down civil procedure rules and inspired by European and Louisiana codes). Other examples include California's codes (1872), and the federal revised statutes (1874) and the current United States Code (1926), which are closer to compilations of statute than to systematic expositions of law akin to civil law codes. For the legal system of Japan, beginning in the Meiji Era, European legal systems—especially the civil law of Germany and France—were the primary models