Frederick II (German: Friedrich II.; 24 January 1712 – 17 August 1786) was King in Prussia from 1740 until 1772, and King of Prussia from 1772 until his death in 1786. His most significant accomplishments include his military successes in the Silesian wars , his re-organisation of the Prussian Army , the First Partition of Poland , and his patronage of the arts and the Enlightenment .
The Hohenzollerns were overthrown and the Weimar Republic was established, thus bringing an end to the German monarchy and Prussian monarchy. Georg Friedrich, Prince of Prussia is the current head of the formerly royal Prussian line, while Karl Friedrich, Prince of Hohenzollern is the head of the formerly princely Swabian line. 
Born during the reign of his great-uncle Frederick William IV of Prussia, Wilhelm was the son of Prince Frederick William and Victoria, Princess Royal. Through his mother, he was the eldest grandchild of Queen Victoria of the United Kingdom. In March 1888, Wilhelm's father ascended the German and Prussian thrones as Frederick III.
The Franco-Prussian War or Franco-German War, [a] often referred to in France as the War of 1870, was a conflict between the Second French Empire and the North German Confederation led by the Kingdom of Prussia. Lasting from 19 July 1870 to 28 January 1871, the conflict was caused primarily by France's determination to reassert its dominant position in continental Europe, which appeared in question following the decisive Prussian victory over Austria in 1866. 
In mid-2019, it emerged that Georg Friedrich, head of the Hohenzollern house which had ruled Prussia as kings and later the German Empire as Emperors, had filed a variety of property claims with the German government.
German States PRUSSIA 10 Mark KM# 514 1888A Proof. New World Price Guide Search. ... Obverse Legend: FRIEDRICH DEUTSCHER KAISER KONIG V. PREUSSEN. Reverse: ...
German States PRUSSIA Coin Price Guide. Powered by NumisMaster. German States PRUSSIA 5 Mark KM# 523 1903A . New World Price Guide Search. Specifications ...
German States PRUSSIA 2 Mark KM# 525 1901A . New World Price Guide Search. Specifications ; Composition: Silver. ... Obverse: Friedrich I, Wilhelm II left. Reverse: ...
Friedrich Wilhelm II had a few rooms transformed, but didn’t change much. His son Friedrich Wilhelm III and his wife Luise spent much of their time at Charlottenburg, also their son Friedrich Wilhelm IV had his apartments here. The last resident of the palace was Emperor Friedrich III, who only reigned for 99 days in 1888.
Barthold Georg Niebuhr, (born Aug. 27, 1776, Copenhagen, Denmark—died Jan. 31, 1831, Bonn, Prussia [Germany]), German historian who started a new era in historical studies by his method of source criticism; all subsequent historians are in some sense indebted to him. Niebuhr was the only son of the Danish explorer Carsten Niebuhr. Up to his matriculation at the University of Kiel he had a solitary education that perhaps intensified his leaning toward a life of scholarship.