London CNN  — 

Queen Elizabeth II died of old age, her death certificate has revealed.

The document, published by National Records of Scotland on Thursday, says the late British monarch died at 3:10 p.m. UK time (10:10 a.m. ET) on September 8 at Balmoral Castle in Ballater, Scotland.

The cause of death is listed as old age. The document is signed by the Queen’s daughter, Princess Anne.

Britain’s longest-reigning monarch died peacefully aged 96.

Her death set into motion a period of national mourning. King Charles III, who ascended to the throne following his mother’s death, was formally proclaimed as the United Kingdom’s new monarch on September 10.

The death certificate of Queen Elizabeth II

Charles paid tribute to his mother’s historic seven-decade reign, calling it “unequaled in its duration, its dedication and its devotion.”

“Even as we grieve, we give thanks for this most faithful life,” he said during the historic ceremony at St James’s Palace.

Global leaders acknowledged the global impact the Queen had made during her 70-year reign, and the world bid farewell to the monarch on September 19 in a state funeral steeped in pageantry.

Royal family members, dignitaries, presidents and prime ministers gathered at Westminster Abbey for a somber service, while tens of thousands of people flocked to the surrounding streets and along the 25-mile procession route from central London to Windsor, hoping to catch sight of the sovereign’s flag-draped coffin as it journeyed by hearse to her final resting place.

LONDON, ENGLAND - SEPTEMBER 19: The coffin is carried out by pallbearers after the State Funeral of Queen Elizabeth II at Westminster Abbey on September 19, 2022 in London, England.  Elizabeth Alexandra Mary Windsor was born in Bruton Street, Mayfair, London on 21 April 1926. She married Prince Philip in 1947 and ascended the throne of the United Kingdom and Commonwealth on 6 February 1952 after the death of her Father, King George VI. Queen Elizabeth II died at Balmoral Castle in Scotland on September 8, 2022, and is succeeded by her eldest son, King Charles III. (Photo by Hannah McKay - WPA Pool/Getty Images)
Watch key moments from Queen Elizabeth II's funeral
04:14 - Source: CNN

Later that evening, she was interred together with her husband of 73 years, the Duke of Edinburgh, in the King George VI Memorial Chapel. An annex of St. George’s Chapel, it also houses the remains of the Queen’s father, her mother the Queen Mother, and her sister Princess Margaret.

Buckingham Palace released a photograph revealing the sovereign’s final resting place last week, which showed an engraved ledger stone made of hand-carved Belgian black marble featuring brass letter inlays reading the names of her parents and her husband.