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In page Napoleon III:

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Soon after becoming emperor, Napoleon III began searching for a wife to give him an heir.[citation needed] He was still attached to his companion Harriet Howard, who attended receptions at the Élysée Palace and traveled around France with him.[citation needed] He quietly sent a diplomatic delegation to approach the family of Princess Carola of Vasa, the granddaughter of deposed King Gustav IV Adolf of Sweden. They declined because of his Catholic religion and the political uncertainty about his future, as did the family of Princess Adelheid of Hohenlohe-Langenburg, a niece of Queen Victoria.[citation needed]