Maria Theresa of Austria-Este was Queen of Sardinia as the wife of Victor Emmanuel I of Sardinia. She was born an archduchess of Austria-Este and a princess of Modena as the daughter of Ferdinand Karl, Archduke of Austria-Este, and Maria Beatrice d'Este, Duchess of Massa. Her husband’s reign as King of Sardinia ended in abdication in 1821, when he elected his brother Charles Felix king after a liberal revolution, during which Victor Emmanuel proved unwilling to accept a liberal constitution. She was a part of the then newly-founded House of Austria-Este.

Maria Teresa of Savoy was Duchess consort of Parma and Piacenza by marriage to Charles II, Duke of Parma.