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| Former states and territories of Germany | |
|---|---|
| Name | Former states and territories of Germany |
| Caption | Map showing Central Europe in 1648 after the Peace of Westphalia with many Holy Roman Empire territories |
| Era | Medieval–Cold War |
| Start | East Francia |
| End | German reunification |
Former states and territories of Germany
This article surveys polities, principalities, duchies, kingdoms, protectorates, colonies, and occupied regions that once lay within or were administered by German polities from the medieval period through German reunification. It traces transformations under rulers and dynasties such as the Ottonian dynasty, Hohenstaufen dynasty, Habsburg monarchy, House of Hohenzollern, and events including the Treaty of Verdun, Peace of Westphalia, Congress of Vienna, Franco-Prussian War, Treaty of Versailles (1919), and Paris Peace Conference (1919). The entry connects medieval imperial structures to modern borders affected by the Yalta Conference, Potsdam Conference, and the Treaty on the Final Settlement with Respect to Germany.
The medieval fragmentary polity of East Francia evolved through the Holy Roman Empire into a mosaic of electorates, free cities, Ecclesiastical principalities such as Prince-Bishopric of Mainz, dynastic realms like the Electorate of Saxony, and secular duchies including Duchy of Bavaria and Duchy of Swabia. The Reformation and wars like the Thirty Years' War reshaped sovereignty, culminating in the Peace of Westphalia and the decline of imperial absolutism. Revolutionary upheavals from the French Revolutionary Wars through the Napoleonic Wars produced the Confederation of the Rhine and the consolidation of territories under rulers such as Napoleon and the House of Bourbon in adjacent states. Nineteenth-century national movements—embodied by figures like Otto von Bismarck and events like the Revolutions of 1848—led to the formation of the German Empire in 1871, its colonial acquisitions in German colonial empire regions like German East Africa, and later 20th-century losses after World War I. The Weimar Republic era, the Third Reich, and World War II caused annexations, occupied zones, and the postwar partition into Federal Republic of Germany and German Democratic Republic, with final border confirmations after the Two Plus Four Agreement and German reunification.
The Holy Roman Empire contained hundreds of polities such as the Duchy of Brunswick-Lüneburg, Margraviate of Brandenburg, County Palatine of the Rhine, Electorate of Hanover, and Kingdom of Bohemia (a crown land with ties to the Habsburg Monarchy). Ecclesiastical territories included the Prince-Archbishopric of Cologne and the Prince-Bishopric of Würzburg. Urban republics like Free Imperial City of Hamburg, Free Imperial City of Lübeck, and Free Imperial City of Frankfurt enjoyed imperial immediacy. Dynastic houses—Welf dynasty, House of Wettin, House of Habsburg-Lorraine—ruled principalities such as the Electorate of Saxony, Grand Duchy of Baden, and Grand Duchy of Mecklenburg-Schwerin until secularization, mediatization, and realignment under treaties like the Reichsdeputationshauptschluss.
Napoleonic confiscations and the Treaty of Lunéville accelerated consolidation into client states within the Confederation of the Rhine such as the Kingdom of Bavaria, Kingdom of Württemberg, and the Grand Duchy of Frankfurt. The Duchy of Nassau, Principality of Regensburg, and Kingdom of Saxony experienced territorial gains and losses tied to alliances with Napoleon Bonaparte. The Battle of Leipzig and the Congress of Vienna dismantled the Confederation, redistributed lands to powers like Prussia and Austria, and restored or created states including the Kingdom of Hanover and the Kingdom of Prussia provinces.
The German Confederation formed after the Congress of Vienna encompassed the Austrian Empire-led German states and Kingdom of Prussia holdings, including the Grand Duchy of Hesse, Saxe-Coburg and Gotha, and smaller duchies such as Saxe-Weimar-Eisenach. Nationalist and dynastic tensions produced wars: the First Schleswig War involved Duchy of Holstein and Duchy of Schleswig; the Austro-Prussian War (Seven Weeks' War) saw Prussia annex Kingdom of Hanover, Electorate of Hesse, and Duchy of Nassau and reorganize northern states into the North German Confederation. The Austro-Hungarian Compromise of 1867 and diplomatic moves by Bismarck further marginalised Austrian influence in German affairs.
After the Franco-Prussian War and the Proclamation of the German Empire (1871) at Versailles, the empire unified kingdoms and duchies under the Kaiser Wilhelm I and the Chancellorship of Bismarck. Constituent states—Kingdom of Bavaria, Kingdom of Saxony, Grand Duchy of Baden, Grand Duchy of Hesse, and Prussian provinces—retained internal autonomy before centralizing reforms. Overseas expansion produced the German colonial empire with colonies like Kaiser-Wilhelmsland, German South-West Africa, German New Guinea, Kamerun, and Togoland. Imperial policies, industrialization driven in regions like the Ruhr, and diplomatic crises—Moroccan Crises—shaped the late imperial balance until defeat in World War I and the Treaty of Versailles (1919) stripped colonies and imposed territorial adjustments such as ceding Alsace-Lorraine to France earlier reversed in 1871 then reconfigured.
The Weimar Republic reorganized states: the Free State of Prussia remained large while other states like the Free State of Bavaria persisted. The Nazi regime abolished federal structures via Gleichschaltung, replaced Länder with Gaue under leaders such as Julius Streicher and Gauleiters, and annexed territories in the Anschluss with Austria and the Sudetenland seized after the Munich Agreement. Occupations created entities like the Protectorate of Bohemia and Moravia and Reichskommissariat Ukraine; wartime annexations included Alsace-Lorraine and parts of Poland such as the Warthegau. After World War II, Nazi territorial changes were largely reversed by the Allied occupation zones, Nuremberg Trials, and population transfers under agreements like the Potsdam Agreement.
Postwar settlements partitioned German territory: western zones under United States, United Kingdom, and France evolved into the Federal Republic of Germany while the Soviet Union zone became the German Democratic Republic; key areas such as Saar Protectorate had special status before reintegration. The eastern territories—Silesia, Pomerania, East Prussia—were transferred to Poland and the Soviet Union (Kaliningrad Oblast) and saw expulsions of German populations under the Expulsion of Germans after World War II. The Basic Law for the Federal Republic of Germany and later the Treaty on the Final Settlement with Respect to Germany culminated in German reunification and confirmation of borders with Poland in the Treaty of Warsaw context. Contemporary federal states such as Bavaria, Saxony, and Brandenburg trace boundaries and legal continuities back to these former entities.