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In page Maria Anna of Savoy:

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Maria Anna was born on 19 September 1803 in Palazzo Colonna in Rome, the daughter of King Victor Emmanuel I of Sardinia and his wife, Archduchess Maria Teresa of Austria-Este. She had a twin sister, Maria Teresa. The two princesses were baptised by Pope Pius VII.[citation needed] Their godparents were their maternal grandparents, Archduke Ferdinand of Austria-Este and his wife Maria Beatrice Ricciarda d'Este. In the Museo di Roma can be seen a painting of the baptism.[1] She was known as "Pia" within the family.[citation needed]