Prince William was the first-ever heir to the throne to break one royal tradition even while he was still a baby. However, the decision actually came from Princess Diana.

On June 21, 1982, Princess Diana gave birth to Prince William at St. Mary’s Hospital’s Lindo Wing. His arrival made royal history because he was the first heir to the throne who was not born inside Buckingham Palace.

Prince William’s dad, Prince Charles, who is in direct succession to the throne after Queen Elizabeth II, was born in the palace several years ago. But the late Princess of Wales decided to welcome her sons at Paddington in London.

Both the Duke of Cambridge and the Duke of Sussex were born at an exclusive maternity ward. Years later, Prince William and Kate Middleton followed in Princess Diana’s footsteps by welcoming their three children at the same facility.

Giving birth at the Lindo Wing is actually quite pricey. A one-night stay is estimated at over $7,630 or £5,900. A deluxe package is priced at over $8,114 or £6,275.

But since Kate is a member of the royal family, it is believed that she stayed in one of the unit’s suites, which costs over $9,699 or £7,500. Some of the included packages at the Lindo Wing are midwife care, theater fees, routine midwife appointments, routine blood tests, pediatrician fee for the first baby, natal care, postnatal physiotherapy and more.

Blood transfusions, scans, non-routine medication and induction, and other services that may be required cost extra. Following the birth of Prince William and Prince Harry, as well as of Prince William and Kate’s three children, royal fans got to see them outside the steps of the hospital.

However, the first child of Prince Harry and Meghan Markle won’t make the same public appearance just hours after its birth. This is because the “Suits” alum is rumored to give birth at her home at Frogmore Cottage. This decision will revert to the Queen’s time and will follow her footsteps in giving birth to royal children at home instead of the hospital.

Prince William Prince William, Duke of Cambridge, officially opens Brains Brewery before attending the Wales vs Ireland Six Nations Match on March 16, 2019, in Cardiff, Wales. Richard Stonehouse - WPA Pool/Getty Images