how and when did the dukes of brandenburg become kings of prussia
List of rulers of Brandenburg The early rulers came from several different dynasties, but from 1415 Brandenburg and its successor states were ruled by the House of Hohenzollern for over 500 years. From 1618 onward, Brandenburg was ruled in personal union with the Duchy of Prussia. The Hohenzollerns raised Prussia to a kingdom as the Kingdom of Prussia in 1701, and from then on Brandenburg was de facto treated as part of the kingdom even though it was legally still part of the Holy Roman Empire. The titles of Margrave of Brandenburg and Elector of Brandenburg were abolished along with the Holy Roman Empire in 1806, and Brandenburg was formally integrated into Prussia. Despite this, the Prussian kings still included the title "Margrave of Brandenburg" in their royal style. From 1871 to 1918 the Hohenzollerns were also German Emperors.
Abolition of monarchy In 1858 the Mughal Empire came to an end after losing a war against Britain, and its Emperor, Bahadur Shah II, lost his throne. Between 1859 and 1861, four monarchies in Southern Europe ceased to exist: Parma, Modena, Tuscany and the Two Sicilies, when they all became part of the new Kingdom of Italy. The Second Mexican Empire collapsed in 1867, and its Emperor, Maximilian I of Mexico, was executed. The Second French Empire came to an end in 1870 after it had lost the war against Prussia, causing Emperor Napoleon III to lose his throne. He was the last monarch of France.