Princess Maria Ana Rafaela Micaela Gabriela Lourença of Braganza, Infanta of Portugal^{[citation needed]}, full Portuguese name: Maria Ana Rafaela Micaela Gabriela Lourença de Bragança, Infanta de Portugal^{[citation needed]} (3 September 1899 – 23 June 1971) was a member of the House of Braganza and the wife of Karl August, 10th Prince of Thurn and Taxis.

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Maria Ana was born at Schloss Fischhorn in Zell am See, Austria-Hungary (now in Austria), the fourth daughter of the Miguelist pretender to the Portuguese throne Miguel Januário, Duke of Braganza and his second wife Princess Maria Theresa of Löwenstein. Maria Ana's father was the head of the non reigning branch of the Portuguese Royal House that had been exiled from Portugal. The exile was the result of the Portuguese law of banishment of 1834 and the constitution of 1838 which was brought about because his grandfather Miguel I of Portugal had in 1828 usurped the throne of Portugal from Queen Maria II. Her grandfather reigned as king until 1834 when Maria II was restored. Those Portuguese who recognised Maria Ana's father as rightful king of Portugal acknowledged Maria Ana as an Infanta of Portugal.

Maria Ana married Prince Karl August of Thurn and Taxis, third eldest son of Albert, 8th Prince of Thurn and Taxis and his wife Archduchess Margarethe Klementine of Austria, on 18 August 1921 at Schloss Taxis in Dischingen, Baden-Württemberg, Germany. After their wedding they moved to Schloss Höfling. Maria Ana and Karl August had four children:

Quick Facts Styles of, Reference style ...

Styles of Princess Maria Anna of Thurn and Taxis
Reference style	Her Royal Highness
Spoken style	Your Royal Highness

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• Princess Clotilde of Thurn and Taxis (born 30 November 1922 – 1 September 2009)
• Princess Mafalda of Thurn and Taxis (born 6 March 1924 – 24 July 1989)
• Johannes, 11th Prince of Thurn and Taxis (5 June 1926 – 28 December 1990)
• Prince Albert of Thurn and Taxis (23 January 1930 – 4 February 1935)

Princess Maria Ana died in Feldafing, Bavaria, Germany.