Otto Eduard Leopold, Prince of Bismarck's titled name, Otto von Bismarck, comes from Bismarck, in what district of Germany?
Saalekreis
Title: Wettin, Saxony-Anhalt
Passage: Wettin is a small town and a former municipality in the Saalekreis district of Saxony-Anhalt, Germany, situated on the River Saale north of Halle.  Since 1 January 2011, it is part of the town Löbejün-Wettin.  It is known for Wettin Castle, the ancestral seat of the House of Wettin, ruling dynasty of Saxony and Poland.  Wettin sights include the Tower of Bismarck, the town hall, and the castle (used as the Burggymnasium).
Title: Otto von Bismarck
Passage: Otto Eduard Leopold, Prince of Bismarck, Duke of Lauenburg (1 April 1815 – 30 July 1898), known as Otto von Bismarck (] ), was a conservative Prussian statesman who dominated German and European affairs from the 1860s until 1890.  In the 1860s, he engineered a series of wars that unified the German states, deliberately excluding Austria, into a powerful German Empire under Prussian leadership.  With that accomplished by 1871, he skillfully used balance of power diplomacy to maintain Germany's position in a Europe which, despite many disputes and war scares, remained at peace.  For historian Eric Hobsbawm, it was Bismarck who "remained undisputed world champion at the game of multilateral diplomatic chess for almost twenty years after 1871, [and] devoted himself exclusively, and successfully, to maintaining peace between the powers".  However, his annexation of Alsace-Lorraine gave new fuel to French nationalism and promoted Germanophobia in France.  This helped set the stage for the First World War.
Title: House of Bismarck
Passage: The House of Bismarck is a German noble family that rose to prominence in the 19th-century, largely through the achievements of the statesman Otto von Bismarck.  He was granted the hereditary title of Prince of Bismarck in 1871, a hereditary comital title in 1865 and a ducal title, Duke of Lauenburg, held only for his own lifetime.  Several of Otto's descendants, notably his son Herbert, Prince of Bismarck, were also politicians.
Wettin, Saxony-Anhalt Otto von Bismarck