Karl August
Prince of Thurn and Taxis
Karl August in 1911, aged 12
Head of the House of Thurn and Taxis
Period	13 July 1971 – 26 April 1982
Predecessor	Franz Joseph
Successor	Johannes
Born	(1898-07-23)23 July 1898 Schloss Garatshausen, Feldafing, Kingdom of Bavaria, German Empire
Died	26 April 1982(1982-04-26) (aged 83) Regensburg, Bavaria, Germany
Burial	Gruftkapelle, Saint Emmeram's Abbey, Regensburg
Spouse	Princess Maria Anna of Braganza
Issue	Princess Clotilde Princess Mafalda Johannes, 11th Prince of Thurn and Taxis Prince Albert
Names German: Karl August Joseph Maria Maximilian Lamoral Antonius Ignatius Benediktus Valentin
House	Thurn and Taxis
Father	Albert, 8th Prince of Thurn and Taxis
Mother	Archduchess Margarethe Klementine of Austria
Religion	Roman Catholic

Karl August Joseph Maria Maximilian Lamoral Antonius Ignatius Benediktus Valentin, 10th Prince of Thurn and Taxis^{[citation needed]} (full German name: Karl August Joseph Maria Maximilian Lamoral Antonius Ignatius Benediktus Valentin Fürst von Thurn und Taxis;^{[citation needed]} 23 July 1898 – 26 April 1982) was the tenth Prince of Thurn and Taxis and Head of the Princely House of Thurn and Taxis from 13 July 1971 until his death on 26 April 1982.^{[citation needed]}

Karl August was the third son and child of Albert, 8th Prince of Thurn and Taxis, and his wife, Archduchess Margarethe Klementine of Austria.^{[citation needed]} After graduating from a local high school, Karl August studied science at the University of Würzburg.

Karl August married Infanta Maria Ana of Portugal, daughter of Dom Miguel, Duke of Braganza, and his wife Princess Maria Theresa of Löwenstein-Wertheim-Rosenberg, on 18 August 1921 at Schloss Taxis in Dischingen, Baden-Württemberg, Germany.^{[citation needed]} Karl August and Maria Ana had four children:^{[citation needed]}

• Princess Clotilde of Thurn and Taxis (30 November 1922 – 1 September 2009)^{[citation needed]} married Prince Hans-Moritz of Liechtenstein (son of Prince Alfred Roman of Liechtenstein)
• Princess Mafalda of Thurn and Taxis (6 March 1924 – 24 July 1989)^{[citation needed]} married Prince Franz of Thurn and Taxis (a distant cousin)
• Johannes, 11th Prince of Thurn and Taxis (5 June 1926 – 28 December 1990)^{[citation needed]} married Countess Gloria von Schonbürg-Glauchau (daughter of Joachim, Count of Schönburg-Glauchau and Countess Beatrix Széchenyi de Sárvár-Felsővidék)
• Prince Albert of Thurn and Taxis (23 January 1930 – 4 February 1935)^{[citation needed]}

After his marriage, Karl August and his wife resided at Schloss Höfling in Regensburg where he managed the family's agricultural interests in nearby Burgweinting.^[1] As a committed opponent to Nazism, Karl August forbade his children, after the Machtergreifung, to join the Hitler Youth.^[2]

Because of his anti-Nazi attitude, Karl August was imprisoned in a Gestapo prison in Landshut from 1944 to 1945.

Styles of Karl August, Prince of Thurn and Taxis
Reference style	His Serene Highness
Spoken style	Your Serene Highness

After the death of his elder brother Franz Josef in 1971, Karl August was aged 73 when he succeeded as Head of the House of Thurn and Taxis. During this time, he was responsible for the modernization of the agricultural and forestry possessions of the House of Thurn and Taxis, and he built homes for his workers and employees.

In addition, he supported the continued preservation of the cultural-historical heritage of the House of Thurn and Taxis. Karl August restored interior parts of Saint Emmeram's Abbey, as well as tapestries from the 17th and 18th centuries.^[3]

After his death on 26 April 1982, Karl August was entombed in the chapel of Saint Emmeram's Abbey.