Queen Elizabeth II’s cause of death has been confirmed as Scottish authorities have released her death certificate

London — Queen Elizabeth II died of “old age,” according to the late British monarch’s death certificate.

National Records of Scotland released an extract from the certificate on Thursday. It listed the Queen’s cause of death as advanced age and said she died at 3.10pm local time on September 8 at her summer home in Balmoral, Scotland.

Her death was registered by her daughter, Princess Anne, on September 16.

At around 12:30pm on September 8, Buckingham Palace released a statement about the Queen’s health, saying doctors were concerned and that she would remain under medical supervision. Her death was announced to the public at approximately 6:30 p.m.

Just two days earlier, a photo was released of the 96-year-old monarch meeting Liz Truss to formally ask her to become the UK’s new Prime Minister. Earlier this year, Elizabeth celebrated her platinum jubilee, marking 70 years on the throne.

For months, Britain’s longest-reigning monarch has been suffering from what Buckingham Palace described only as “mobility issues.” Health problems forced her to withdraw from many public events.

After news of her death, tributes poured in from around the world. A 10-day period of national mourning was declared and the Queen’s coffin lay in state at Westminster Hall in London. Tens of thousands of members of the public queued for hours to pay their respects.

At her death, the crown automatically passed to her eldest son Charles, who became King Charles III.

“I am deeply conscious of this great legacy and the duties and heavy responsibilities of sovereignty that have now passed to me,” Charles said. “As I take on these responsibilities, I will strive to follow the inspiring example that has been set for me.”