 
 <prompt> Wetin be di name of Thuringia for late 12th century? Given di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: The Thuringian Realm dey exist reach 531 and later, the Landgraviate of Thuringia na di biggest state for di area, wey dey last from 1131 reach 1247. After dat time, no state dey wey dem call Thuringia, but di term dey commonly describe di area between di Harz mountains for di north, di Weiße Elster river for di east, di Franconian Forest for di south and di Werra river for di west. After di Treaty of Leipzig, Thuringia get their own dynasty again, wey be di Ernestine Wettins. Their different lands join together form di Free State of Thuringia, wey dem found for 1920, along with some other small principalities. The Prussian territories around Erfurt, Mühlhausen and Nordhausen join Thuringia for 1945. 