Joachim Karl Ludwig Mortimer Graf von Maltzan (or Maltzahn), Freiherr

Freiherr

The German titles Freiherr and Freifrau and Freiin are titles of nobility, used preceding a person's given name or, after 1919, before the surname...

 von Wartenberg und Penzlin (born 1793 at Schloss Lissa; died 1843 in Berlin) was a Prussian diplomat and Foreign Minister

Foreign Minister of Prussia

This page lists Foreign Ministers of Prussia. See also Foreign Minister of Germany and Prime Minister of Prussia. After the creation of the German Empire in 1871, the Imperial Chancellor was normally also Foreign Minister of Prussia...

 from 1841 to 1842.

Maltzan was the son of the Count Joachim Alexander Kasimir Maltzahn and his wife Antoinie (née Hoym). He himself married the Countess Auguste von der Goltz.

Maltzan participated in the War of the Sixth Coalition

War of the Sixth Coalition

In the War of the Sixth Coalition , a coalition of Austria, Prussia, Russia, the United Kingdom, Portugal, Sweden, Spain and a number of German States finally defeated France and drove Napoleon Bonaparte into exile on Elba. After Napoleon's disastrous invasion of Russia, the continental powers...

 as an officer in the Prussian Garde du Corps. Then he joined the diplomatic service. At first he was a legation secretary in various embassies. Later he was the chargé d'affaires in Darmstadt

Darmstadt

Darmstadt is a city in the Bundesland of Hesse in Germany, located in the southern part of the Rhine Main Area.The sandy soils in the Darmstadt area, ill-suited for agriculture in times before industrial fertilisation, prevented any larger settlement from developing, until the city became the seat...

 and envoy to The Hague

The Hague

The Hague is the capital city of the province of South Holland in the Netherlands. With a population of 500,000 inhabitants , it is the third largest city of the Netherlands, after Amsterdam and Rotterdam...

, Hannover and Vienna

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

. Lastly he had the rank of minister plenipotentiary.

In 1841 Maltzan was made Prussian Foreign Minister. Karl August Varnhagen von Ense

Karl August Varnhagen von Ense

Karl August Varnhagen von Ense was a German biographer, diplomat and soldier.-Biography:He was born at Düsseldorf, with siblings including Rosa Maria Varnhagen. He studied medicine in Berlin, but spent more time on philosophy and literature, which he later studied more thoroughly at Halle and...

 reproduced a report by Wilhelm von Humboldt

Wilhelm von Humboldt

Friedrich Wilhelm Christian Karl Ferdinand Freiherr von Humboldt was a German philosopher, government functionary, diplomat, and founder of Humboldt Universität. He is especially remembered as a linguist who made important contributions to the philosophy of language and to the theory and practice...

, according to which King Frederick William IV

Frederick William IV of Prussia

|align=right|Upon his accession, he toned down the reactionary policies enacted by his father, easing press censorship and promising to enact a constitution at some point, but he refused to enact a popular legislative assembly, preferring to work with the aristocracy through "united committees" of...

was more satisfied with Maltzan than with any other of ministers, and had complete trust and confidence in him. Due to a severe mental illness, however, he was dismissed already in 1842.