Millions saw the assembled political leaders of the United Kingdom, including five previous prime ministers, prelates of the Church of England, judges and public officials, shout "God Save the King" with all the fervour of medieval barons whose allegiance might otherwise be suspect.
The Proclamation was echoed over the weekend in other countries that retain the monarchy as their head of state. But the ceremonies in capitals such as Canberra and Wellington had deliberately different qualities. Indigenous cultures and languages were to the fore and speeches in English were prosaic.
New Zealand's Governor General called it "a moment of deep and historic significance" for this country and said it would be her honour to serve as King Charles' representative. The Prime Minister said: "King Charles has long had an affection for Aotearoa New Zealand and has consistently demonstrated his deep care for our nation. This relationship is deeply valued by our people. I have no doubt it will deepen."
Those were hardly ringing endorsements of our constitutional connection but they gave no hint of an inclination to change it. Jacinda Ardern's confidence that the relationship will "deepen" under Charles is a notable change from her previous equivocation on the future of the monarchy here.
She was referring this time to New Zealand's relationship with the royal family rather than the institution, and her sentiments are probably true of most countries that retain the monarchy. Its strength is that it places constitutional stability in a person who cannot be replaced, and a family everyone recognises. It is ancient, familiar and works. Any change will not be hurried.