Duchy of Brunswick

The Duchy of Brunswick was a historical German state. Its capital was the city of Brunswick. It was established as the successor state of the Principality of Brunswick-Wolfenbüttel by the Congress of Vienna in 1815. In the course of the 19th-century history of Germany, the duchy was part of the German Confederation, the North German Confederation and from 1871 the German Empire. It was disestablished after the end of World War I, its territory incorporated into the Weimar Republic as the Free State of Brunswick. History Principality of Brunswick-Wolfenbüttel The title "Duke of Brunswick and Lüneburg" was held, from 1235 on, by various members of the Welf (Guelph) family who ruled several small territories in northwest Germany. These holdings did not have all of the formal characteristics of a modern unitary state, being neither compact nor indivisible. When several sons of a Duke competed for power, the lands often became divided between them; when a branch of the family lost power or became extinct, the lands were reallocated among surviving members of the family; different dukes might also exchange territories. The unifying element of all these territories was that they were ruled by male-line descendants of Duke Otto I (ruled 1235–1252).