 The "Deutsche Rechtsalterthümer" ("German Legal Antiquities", 1828) was a comprehensive compilation of sources of law from all Germanic languages, whose structure allowed an initial understanding of older German legal traditions not influenced by Roman law.Grimm's "Weisthümer" (4 vol., 1840–63), a compilation of partially oral legal traditions from rural Germany, allows research of the development of written law in Northern Europe.Jacob Grimm's work tied in strongly with his views on Germany and its culture.