The crown jewels aren’t the only treasures being moved under armed guard this week. In a symbolic power shift that has left royal watchers gasping, the Princess of Wales has quietly taken full control of the entire royal tiara collection – and Queen Camilla’s most prized diadems have been photographed being carried out of her private apartment in black security boxes marked “Return to Vault – Indefinitely.”

Palace staff whisper that Catherine arrived unannounced at the Queen’s private dressing room on Wednesday evening with two equerries, the Keeper of the Jewels, and a short handwritten note on Kensington Palace stationery.

The note, reportedly in Catherine’s own hand, read:

“By direction of the Way Ahead Group, all pieces on loan to Queen Camilla are recalled for inventory and conservation effective immediately. HRH The Princess of Wales will assume personal oversight until further notice. – C

Within twenty minutes, the Greville Tiara (Camilla’s signature “honeycomb” diadem worn at the Coronation), the Girls of Great Britain and Ireland Tiara (once Queen Elizabeth’s favorite), and the Belgian Sapphire Tiara were removed from Camilla’s safes and transferred to a newly reinforced strongroom beneath Kensington Palace – a room whose combination is now known only to Catherine and Princess Anne.

A senior jewel-house source described the scene as “ice-cold theater.” Camilla, informed by telephone while at Clarence House, is said to have listened in silence before replying simply, “Do what you must,” and hanging up.

But the real humiliation was still to come.

Last night, in what courtiers are already calling “The Sandringham Letter,” Princess Anne personally signed and dispatched an invitation list for the traditional pre-Christmas Diplomatic Corps gala at Buckingham Palace – an event Queen Camilla has co-hosted every year since 2005. Camilla’s name was not on it.

Instead, the invitation – embossed with the joint cyphers of King Charles and the Princess Royal, and the Princess of Wales – reads:

Their Majesties The King and The Princess of Wales, together with Her Royal Highness The Princess Royal, request the pleasure of your company…

For the first time in twenty years, the Queen Consort has been erased from one of the royal calendar’s most glittering nights.

A Clarence House aide, visibly shaken, confirmed that Camilla received the invitation (addressed only to “Her Majesty”) at 8:17 p.m. She reportedly stared at it for a long minute, then told her private secretary: “It seems I am to be a guest in my own house now.”

The symbolism could not be clearer. With King Charles too frail to attend in person, Catherine will glide into the Ballroom on December 9 wearing the Lotus Flower Tiara (last seen on Princess Margaret in the 1970s) while Anne, in the rarely-worn Festoon Tiara, stands at her right hand. Camilla has been offered a seat in the royal box – the same vantage point once reserved for minor European royals and elderly cousins.

The message from the new power axis of Anne and Catherine is unmistakable: the Camilla era is over before Charles has even left the throne.

Royal author Penelope Crestwood, speaking on BBC News this morning, called it “the most ruthless soft coup in modern royal history.”

“Anne has spent fifty years watching people play games with the Crown,” she said. “She has decided the games stop now. And Catherine – sweet, smiling Catherine – has just shown she can be every bit as steely as her husband’s great-grandmother when the institution demands it.”

Even the traditional Christmas Day broadcast is reportedly being re-scripted. Insiders say the King will pre-record a short message from Sandringham wishing the nation well, but the closing walkabout – the moment the cameras linger longest – will feature only William, Catherine, and their three children, and a prominently placed Princess Anne. Camilla is expected to remain inside the house.

As one veteran courtier put it over a stiff gin in the Palace staff bar last night: “We all knew Catherine would be Queen one day. None of us realized it would feel this much like she already is.”

Somewhere in Wiltshire, a set of priceless sapphires and diamonds now sleeps under Catherine’s personal lock and key.

And in London, the woman who spent two decades waiting for a crown is discovering – in the cruelest possible way – that crowns can be taken away just as easily as they are given.