Prince William, Duke of Cambridge, and his children Prince George and Princess Charlotte arrive to visit his wife, Catherine, Duchess of Cambridge and newborn Prince Louis.
He explained the Landaus are also used at the end of the annual St George's Chapel Garter Service to drive members of the Royal Family up the hill to Windsor Castle, and Harry's carriage is in pristine condition as it was refurbished previous year.
Meghan Markle's stepbrother has written an extremely unusual open letter to Prince Harry in which he says that it's "not too late" for him to call off his engagement to his estranged stepsister. OK, so not really, but you get the idea: The carriage is O-P-U-L-E-N-T. In fact, Prince Harry rode in one as his brother's best man.
It will be pulled by Windsor Grey horses, which have been used to pull carriages for the Royal family since Queen Victoria.
Built in 1830, a new top was created in 1969 with large windows, and a partial glass roof, to allow spectators to see the passengers.
The Ascot Landau is a "wonderfully bright, small, lovely carriage, (that is) very easy for people to see", according to a description on the royal website by Crown Equerry Col. Toby Browne.More news: Mueller Gives Trump a List of Questions
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Meghan will tie the knot with Prince Harry at Windsor Castle on May 19.
While William and Kate's wedding guests were ferried between Westminster Abbey and Buckingham Palace in a mini-bus, Harry and Markle's wedding guests will travel in style in state cars from the Royal Mews.
In case of rain at the royal wedding, the Scottish state coach which was used for the Spanish State visit previous year will be used as it is covered with glass and the crowds will be able to see them.
This is not a surprising move from the Queen since she also gave the other members of the royal family a real estate property as wedding presents.