Following the end of World War I , a German National Assembly gathered in the town of Weimar , in the state of Thuringia , after the 19 January 1919 Federal elections , in order to write a constitution for the `` Reich '' .
Following the end of World War I , a German National Assembly gathered in the town of Weimar , in the state of Thuringia , in January 1919 to write a constitution for the `` Reich '' .