Joachim Friedrich von Blumenthal

Joachim Friedrich von Blumenthal (1606–1657) was a German nobleman. He was a diplomat and the founder of the Brandenburg-Prussian Army.

The son of Christoph von Blumenthal and his wife Dorothea von Hacke, and the first cousin of General von Königsmarck, he was educated privately by the family tutor Johannes Crüger from the age of 10, and then attended the Viadrina from 1622, at the age of 15. In 1623 his mother died, and in 1624 his brother was murdered and father died, leaving him in the wardship of his eldest brother Christoph; however he too died within two years and Joachim Friedrich became head of his family, still only 19 years old. He became a protegé of Schwarzenberg and thus closely tied to the pro-Imperial faction in Brandenburg during the period of the Thirty Years' War. Schwarzenberg entrusted him with raising Brandenburg's first-ever standing army. Von Blumenthal also played an important role in the death of Wallenstein. Schwartzenberg sent von Blumenthal to the Emperor Ferdinand II to raise the question of how to dispose of Wallenstein, who was discrediting the Imperial side. The Emperor approved a plan to assassinate Wallenstein and sent von Blumenthal to persuade Gallas to join the conspiracy, in which he succeeded.

On Schwarzenberg's dismissal, von Blumenthal temporarily fell from grace in Brandenburg and took service with the Habsburgs, under whom he was an Imperial War Commissar, but he was then also simultaneously employed as both Brandenburg and the Holy Roman Empire's representative at the Peace of Westphalia of 1648, where he negotiated Brandenburg's acquisition of Halberstadt and other territories. He was several times Brandenburg's representative at Imperial Diets. He became the Great Elector's President of the Privy Council (Prime Minister) and it was in this capacity that he raised the finances and organized the system under which a permanent standing army could be created for the first time. He was the first secular governor of the Principality of Halberstadt.

Von Blumenthal was married first, in 1635, to Katharina von Klitzing, and then in 1639 to Elisabeth von Holtzendorff. His eldest son Christoph Caspar, by his first marriage, became a distinguished diplomat who was Brandenburg's Ambassador to France and negotiated the Peace of Oliva. His other son Montanus, by the second marriage, was a captain in Colonel von Koenigsmarck's regiment and died at Mainz in 1672.

A minister of the Great Elector, von Blumenthal had profited handsomely from the war, and remodeled Stavenow Castle in the Baroque style. He was promoted to Freiherr for his services.

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