Princess Antonia of Prussia, Marchioness of Douro (b. April 28, 1955) is a great-granddaughter of Wilhelm II of Germany and about 357th in line to the British Throne. April 28 is the 118th day of the year (119th in leap years) in the Gregorian Calendar, with 247 days remaining. ... 1955 is a common year starting on Saturday of the Gregorian calendar. ... Wilhelm II of Germany (born Friedrich Wilhelm Viktor Albert von Preußen 27 January 1859–4 June 1941), was the last German Emperor (Kaiser) and the last King (König) of Prussia, ruling from 1888 to 1918. ...

Antonia Elizabeth Brigid Louise Mansfeld was born in London in 1955, the daughter of Prince Frederick of Prussia and Lady Brigid Guiness. 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. The clock tower of the Palace of Westminster, which contains Big Ben London is the capital city of the United Kingdom and of England. ... February 3 is the 34th day of the year in the Gregorian Calendar. ... 1977 was a common year starting on Saturday (the link is to a full 1977 calendar). ... Arthur Charles Valerian Wellesley, Marquess of Douro (born August 19, 1945) is the son and heir of Arthur Valerian Wellesley, 8th Duke of Wellington. ... Arthur Valerian Wellesley, 8th Duke of Wellington, KG, LVO, OBE, MC BA DL, (born 2 July 1915), is a British peer and a retired Brigadier in the British Army. ...

The line of succession to the British Throne (which includes the sovereignty over fifteen other Commonwealth Realms) is determined by male primogeniture and religion, whereby the eldest legitimate son of the incumbent inherits the throne, unless he is Catholic or has married a Catholic, although the laws preventing Papists from... Arthur Gerald Wellesley, Earl of Mornington (born 31 January 1978) is the son of Arthur Charles Valerian Wellesley, Marquess of Douro, and after his father heir to the Dukedom of Wellington. ...