Princess Maria Theresia of Liechtenstein (Maria Theresia Anna Felicitas; 11 May 1694 – 20 February 1772) was the heiress to the Silesian Duchy of Troppau (now Opava in Czech Republic). Countess of Soissons by marriage, she was the last person to hold the title. She had one son who predeceased her in 1734.
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Biography
Maria Theresia's father was Prince Hans-Adam I of Liechtenstein – who purchased the counties of Vaduz and Schellenberg, to form which is the modern state of Liechtenstein (although the first Prince to visit Vaduz did so only in 1844). Her mother, Erdmuthe Maria Theresia of Dietrichstein was the great-granddaughter of Adam von Dietrichstein (1527–1590), Hofmeister to the court of Emperor Rudolf II and buried in St Vitus Cathedral, Prague Castle.
Maria Theresia's father died in 1712 – and both her brothers before that. The main line of the family thus died out, and was replaced, in the princely title of Liechtenstein, by a collateral branch. However, Hans-Adam I passed on to his daughter the ducal title of Troppau (to which Salic law evidently did not apply).
On 24 October 1713, in Vienna, Maria Theresia married Thomas Emmanuel of Savoy-Carignano, Count of Soissons and Governor of Antwerp (born on 8 December 1687), the only surviving nephew of famous Prince Eugene of Savoy, who had played a key role in arranging the marriage. Through it she became a Princess of Savoy, having married into the House of Savoy-Carignano, the principal cadet branch of the House of Savoy—which had recently taken over the Kingdom of Sicily—and, more specifically, into the further cadet line of Savoy-Carignano-Soissons, styled after Marie de Bourbon, Countess of Soissons, wife of the first Prince of Carignano.