Princess Antonia, Marchioness of Douro

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Princess Antonia of Prussia, Marchioness of Douro (b. April 28, 1955) is a great-granddaughter of Wilhelm II of Germany and 349th in line to the British Throne.

Antonia Elizabeth Brigid Louise Mansfeld was born in London in 1955, the daughter of Prince Frederick of Prussia and Lady Brigid Guinness. On February 3, 1977, she married Arthur Wellesley (the son of the 8th Duke of Wellington) and took the courtesy title of Marchioness of Douro. They have five children:

She is Chairman of the Guinness Trust and a Trustee of the National Portrait Gallery.

Preceded by
Francis Achache
Line of succession to the British Throne Succeeded by
Earl of Mornington