Queen Elizabeth II, who ruled the UK for 70 years, passed away at Balmoral at the age of 96.
After worries about her health grew early on Thursday, her family gathered at her Scottish estate.
Elizabeth was a steady and reassuring presence in Britain and on the international scene during her reign, which began in February 1952 following the death of her father, King George VI, and saw her guide her nation through a period of significant changes in geopolitical power and national identity.
After her passing, her eldest son Charles, the former Prince of Wales, would take the throne as the new King and ruler of 14 Commonwealth states, leading the nation in grief.
In a statement, Buckingham Palace said: “The Queen died peacefully at Balmoral this afternoon.
“The King and the Queen Consort will remain at Balmoral this evening and will return to London tomorrow.”
Following the Queen’s placement under medical supervision, all of her children made their way to Balmoral, which is close to Aberdeen.
Prince William, her grandson, is also present, and Prince Harry is en route.
In a rare television documentary that was broadcast in 2012 to commemorate her 60th year as queen, her son and heir Charles encapsulated the strength of her constancy.
Perhaps unconsciously, he suggested, people get a boost or sense of security from something that is always present.
On Tuesday, Elizabeth took her final significant constitutional step when she accepted Prime Minister Boris Johnson’s resignation and ordered Liz Truss, his replacement, to form a new administration.
The reign of Queen Elizabeth II as head of state covered the post-World War II period of austerity, the change from an empire to a Commonwealth, the end of the Cold War, and the UK’s membership in – and exit from – the European Union.
15 prime ministers served during her reign, including Liz Truss, who was chosen by the Queen earlier this week and was born 101 years after Winston Churchill in 1975.
Throughout her rule, she met with her prime minister on a weekly basis.
Elizabeth Alexandra Mary Windsor was born the Queen on April 21, 1926, in Mayfair, London.