Around the year 1235, the Duchy of Brunswick-Lüneburg emerged, ruled by a family whose aristocratic lines repeatedly divided and re-united.
1235. aasta paiku tekkis Braunschweig-Lüneburgi hertsogkond, mida valitses perekond, mille aristokraatlikud liinid korduvalt jagunesid ja taasühinesid.