Tributes began pouring in quickly from political and religious leaders following the death of Pope Francis.
King Charles, who met with the Pope earlier this month, said he and his wife were "deeply saddened" following his death.
In a statement issued on Monday, the King said: "His Holiness will be remembered for his compassion, his concern for the unity of the Church and for his tireless commitment to the common causes of all people of faith, and to those of goodwill who work for the benefit of others."
A royal source also said the Union flag will be flown half mast at royal residences where the King is not in residence and sombre music will be played at the Changing the Guard ceremony to reflect "the sadness of the occasion."
Church bells rung out across the world to honour the late Pope from the Notre Dame in Paris to a lone bell at a St Bartholomew in Bulacan in the Philippines which tolled 88 times to signify Francis’ 88 years of life.
President Donald Trump posted on Truth Social: “Rest in Peace Pope Francis! May God Bless him and all who loved him!”
He also order that all American flags will be flown at half-mast over the White House, government buildings and military posts across the country and its overseas territories until sunset.
US Vice President JD Vance, who met with the Pope on Sunday, the day before he died, paid tribute saying: "My heart goes out to the millions of Christians all over the world who loved him.
“I was happy to see him yesterday, though he was obviously very ill.
"But I’ll always remember him for the homily he gave in the very early days of Covid. It was really quite beautiful. May God rest his soul."
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