The new Prince of Cambridge is the latest addition to the house of Windsor. George V chose the Berkshire town as the family's name in 1917, because of its castle, which remains to this day the preferred weekend home of the Queen.
Sharon Thomas has been to Windsor to find out how they've been celebrating the birth of a future king.
With the imminent arrival of the Duke and Duchess of Cambridge's firstborn here are some of the more unusual facts about royal babies.
We look back at Kate's journey since early December 2012 when it became public knowledge that a royal baby was on its way.
As the Duchess of Cambridge enters St Mary's Hospital in the early stages of labour, royal memorabilia has sprung up across the net.