For the world's strongest, there may be no fixture fairly as uncommon, glittering and wanted as a British coronation.
There has not been one for seven a long time and leaders and their retinues are flying in to participate.
For Britain, it's a likelihood to point out off its finest property and exude and exert as a lot comfortable energy as is diplomatically doable firstly of the Carolean period.
King delights fans on palace walkabout - coronation latest
Convention has for hundreds of years dictated that different topped royals don't attend British coronations. Not this time.
At least 4 kings and queens and a clutch of princes and princesses are on their means. There will likely be 90 heads of state in attendance.
US President Joe Biden is following conference and never coming, represented by his spouse, the primary girl, as an alternative. But most presidents or prime ministers that you'd count on will likely be there.
The Foreign Commonwealth and Development Office (FCDO) says 450 overseas dignitaries will likely be in Westminster Abbey in complete - that's a couple of quarter of the congregation, with 200 nations, realms and Commonwealth international locations being represented.
Seating all of them would require strict adherence to protocol to keep away from inflicting offence.
In entrance rows will likely be overseas royals and representatives of the realms, these 14 international locations that also regard the king as head of state.
Behind them, representatives of abroad territories, then representatives from different commonwealth nations with their very own heads of state. Behind them, different company will likely be seated in strict alphabetical order.
In all, the FCDO will likely be internet hosting 220 overseas delegations this weekend.
The listing of nations to not obtain an embossed invitation from Buckingham Palace is brief and predictable. Afghanistan, Belarus, Myanmar, Russia, Syria, Iran and Venezuela. North Korea has been invited however solely at ambassadorial stage. Nicaragua likewise.
Read extra:Who's missing from the coronation guest list?Here's how other countries do their coronations
But China has been requested. And that's inflicting appreciable controversy as a result of the person Beijing is sending is broadly considered the oppressor of Hong Kong. China's President Xi Jinping has turned down the invite and is sending his vice chairman as an alternative.
Han Zheng is the Chinese official who did most to tear up the British-Chinese settlement over the previous colony, order a brutal crackdown on protests and ship a whole lot to jail.
The Committee for Freedom in Hong Kong Foundation advised Sky News: "It is pretty disgraceful that the architect of Hong Kong's demise has been invited to the coronation of King Charles III while other partners with whom the UK has an excellent relationship with, such as Taiwan, have been excluded.
"Who calls the pictures in Britain, is it Beijing or our prime minister? Why are we kowtowing to Beijing for the visitor listing to our personal coronation?"
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Conservative MP Iain Duncan Smith, who has been sanctioned by the Chinese government, told Sky News: "Han Zheng is primarily answerable for the crack down on democracy campaigners in Hong Kong below the brutal new nationwide safety regulation. Many are British passport holders, notably Jimmy Lai, journalist and proprietor of Apple Daily [the Hong Kong pro-democracy paper].
"The architect of this brutal policy in Hong Kong will rub shoulders with the British PM and the King whilst Jimmy Lai and others have lost their freedom."
Undeterred by the controversy, Britain's Foreign Secretary James Cleverly will likely be assembly Han Zheng forward of the coronation.
His officers say he will likely be discussing "points of criticism" with the vice chairman. Among them will likely be China's treatment of the Uyghur minority in Xinjiang province and failure to abide by commitments in Hong Kong.
But former Hong Kong governor Chris Patten says Han's attendance on the coronation exhibits that China doesn't give "two hoots" concerning the UK.
Ministers are exploiting the presence of a number of overseas dignitaries in London for much less controversial conferences on the sidelines of the occasion.
The authorities will likely be hoping the coronation will likely be a robust projection of Britain's comfortable energy - not least the attendance of globally-known celebrities, from Joanna Lumley and the Beckhams to Mr Bean (aka Rowan Atkinson).
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