As we all know by now, Prince William and Kate, Duchess of Cambridge, are proud parents of a new born son with news of the new arrival provoking celebrations across Britain and, indeed, the world.

To celebrate the royal birth, here are 10 interesting facts about some previous royal births in London…

• The last time a Home Secretary attended a royal birth was in 1936 for the birth of Princess Alexandria, cousin of the Queen. The practice was officially stopped before the birth of Prince Charles in 1948.

• Such was the doubt over whether Mary of Modena, wife of King James II, was really pregnant that more than 40 eminent people were invited to witness the birth of their son Prince James in 1688 (and even then the rumours of that the stillborn baby had been swapped for another were rife).

• Queen Anne, who ruled from 1702-1714, went through 17 pregnancies but, tragically, outlived all of her children, her last surviving child – the Duke of Gloucester – dying in 1700.

• The tradition of firing a 41 gun salute on the news of the birth of a future monarch dates from the birth of the future King Edward VII. Twenty-one shots are fired in honour of the birth with an additional 21 fired because the guns are located in Green Park, a Royal Park.

• Queen Elizabeth II was born by caesarean section at 2.40am on April 21, 1926, at the home of her mother’s parents – 17 Bruton Street in Mayfair. (See our previous post on this here).

• Such was the animosity between Frederick, Prince of Wales, and his father, King George II, that when Frederick’s wife Augusta went into labour at the king’s home of Hampton Court Palace, he bundled her into a coach and had her taken to his home of St James’s Palace. With no preparations made there, his newly born daughter had to be wrapped in a tablecloth (the story is retold in detail in Lucy Worsley’s terrific book, Courtiers: The Secret History of the Georgian Court)

• Queen Victoria, who had nine children, used chloroform for pain relief during later births, despite the concept being frowned upon by some officials.

• Buckingham Palace (pictured above) has been the birthplace of numerous Royal Family members. Of course, Prince Charles was born here in 1948 as was his brother Prince Andrew (1960) and Prince Edward (1964) but so too – somewhat earlier – were 14 of King George III and Queen Charlotte’s 15 children when the property was known as Buckingham House and, later, the Queen’s House. King Edward VII was the only monarch who both was born and died in the building.

• Such was the desperation of King Henry VIII for a son, that a document announcing the birth were drawn up to that effect prior to Anne Boleyn giving birth to a daughter, the future Queen Elizabeth I. The document was still issued – the only concession being an ‘s’ added to the end of the word prince.

• The oldest English king to father a child was King Edward I – he was 66-years-old when his last child, Princess Eleanor, was born in 1306. Queen Eleanor of Aquitaine, wife of King Henry II, was the oldest queen to father a child when she gave birth to the future King John at 44-years-of-age in 1166.