Mourners at Buckingham Palace after death of Queen Elizabeth
People gather outside Buckingham Palace following the announcement of the death of Queen Elizabeth II, in London, Thursday, Sept. 8, 2022. (Victoria Jones/PA via AP) 
People gather in front of Buckingham Palace, after the announcement of the death of Queen Elizabeth II, in London, Thursday, Sept. 8, 2022. Queen Elizabeth II, Britain's longest-reigning monarch and a rock of stability across much of a turbulent century, died Thursday after 70 years on the throne. She was 96. (AP Photo/Alberto Pezzali) 
LONDON, ENGLAND - SEPTEMBER 08: Crowds are seen outside Buckingham Palace on September 8, 2022 in London, England. Buckingham Palace issued a statement earlier today saying that Queen Elizabeth was placed under medical supervision in Balmoral due to concerns about her health. (Photo by Leon Neal/Getty Images) 
People gather in front of Buckingham Palace in London, Thursday, Sept. 8, 2022. Buckingham Palace says Queen Elizabeth II has been placed under medical supervision because doctors are "concerned for Her Majesty's health." Members of the royal family traveled to Scotland to be with the 96-year-old monarch. (AP Photo/Frank Augstein) 
LONDON, ENGLAND - SEPTEMBER 08: Members of the public seen outside of Buckingham Palace on September 8, 2022 in London, England. Buckingham Palace issued a statement earlier today saying that Queen Elizabeth was placed under medical supervision in Balmoral due to concerns about her health. (Photo by Leon Neal/Getty Images) 
LONDON, ENGLAND - SEPTEMBER 08: Members of the public seen outside of Buckingham Palace on September 8, 2022 in London, England. Buckingham Palace issued a statement earlier today saying that Queen Elizabeth was placed under medical supervision in Balmoral due to concerns about her health. (Photo by Leon Neal/Getty Images) 
A notice is placed on the gates of the Palace of Holyroodhouse in Edinburgh, on September 8, 2022 following the announcement of the death of Britain's Queen Elizabeth II. - Queen Elizabeth II, the longest-serving monarch in British history and an icon instantly recognisable to billions of people around the world, has died aged 96, Buckingham Palace said on September 8, 2022. Her eldest son, Charles, 73, succeeds as king immediately, according to centuries of protocol, beginning a new, less certain chapter for the royal family after the queen's record-breaking 70-year reign. (Photo by Lesley Martin / AFP) (Photo by LESLEY MARTIN/AFP via Getty Images) 
LONDON, ENGLAND - SEPTEMBER 08: A sign noting the cancellation of today's guard changing ceremony at Buckingham Palace on September 8, 2022 in London, England. Buckingham Palace issued a statement earlier today saying that Queen Elizabeth was placed under medical supervision in Balmoral due to concerns about her health. (Photo by Leon Neal/Getty Images) 
LONDON, ENGLAND - SEPTEMBER 08: A view of Buckingham Palace on September 8, 2022 in London, England. Buckingham Palace issued a statement earlier today saying that Queen Elizabeth was placed under medical supervision in Balmoral due to concerns about her health. (Photo by Leon Neal/Getty Images) 
LONDON, ENGLAND - SEPTEMBER 08: A rainbow is seen outside of Buckingham Palace on September 8, 2022 in London, England. Buckingham Palace issued a statement earlier today saying that Queen Elizabeth was placed under medical supervision in Balmoral due to concerns about her health. (Photo by Leon Neal/Getty Images)
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LONDON (NewsNation) — Crowds began to gather outside London’s Buckingham Palace on Thursday to mourn the death of Queen Elizabeth II.
The British monarch who reigned for more than 70 years passed away at 96 after she was placed under medical supervision in Balmoral due to concerns about her health.
The Associated Press contributed to this report.