King Charles’sroyal emblem has made its debut at the Tower of London.

On Monday, guards at the 1,000-year-old castle, known as Yeoman Warders, donned new uniforms bearingthe King’s royal cypherfor the first time.

“The wait is over, today our Yeoman Warders at the Tower of London will wear their new uniforms for the very first time, bearing HM King Charles III’s cypher!” the historic royal palaces charity wrote onInstagram, along with three photos of the warders' new look.

The monogram that now lies at the center of the uniform shows the crown above the King’s first initial, “C,” intertwined with an “R” for Rex (Latin for King, traditionally used for the monarch dating back to the 12th century), with “III” inside the “R.”

Buckingham Palace/PA Wire; Julian Simmonds/Shutterstock

King Charles III new cypher; Yeoman Warder uniform with King Charles III’s insignia worn at The Tower of London

The account also shared avideofrom London’s ancient castle, showing the guards — or Beefeaters, are they are popularly called — admiring the historic significance of their new uniform.

Julian Simmonds/Shutterstock

The first day for the new Yeoman Warder uniform with King Charles III’s insignia worn at The Tower of London.Clive Towell - Yeoman Sergeant marching with the Welsh Guards at the Tower.

“Today is a monumental day in our history, because for 70 plus years now, people have been seeing E II R on this uniform,” Clive Towell, a Yeoman Serjeant, said in reference to the previous cypher ofQueen Elizabeth. “However, today, two weeks before the coronation, 70 plus years on, it will say, for the first day, ‘C III R,’ Charles the third King. And so for us, this is huge. Emotional day, but a really good day as we step into this new reign.”

“We can actually stand proud today when thousands come through the gate, and we’ll just look down and say, ‘Job done. Ready to go,'” added Peter McGoran MVO, who is cited as a Chief Yeoman Warder.

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A photograph taken on April 24, 2023 shows the new uniform of Yeoman Warder with Britain’s King Charles III’s insignia ahead of his Coronation, during the opening of the Tower of London, to the public

The update to the Beefeaters’ uniform comes just two weeks ahead ofKing Charles' coronation, which is set to take place on May 6 at Westminster Abbey. His wife,Queen Camilla, 75, will also be crowned duringthe three-day celebration.

Both the King’s sons,Prince William, 40, andPrince Harry, 38, will attend the ceremony, while Meghan Markle, 41, willremain in Californiawith Prince Archie, 3, and Princess Lilibet, 22 months — and celebrate Archie turning 4.

“It’s going to be a low-key party at home,” a source told PEOPLE in a recentcover story. “They’ll have friends around them and Meghan’s mom, Doria [Ragland]. Meghan will definitely have support that weekend.”

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A source close to the royal household told PEOPLE: “It is such a momentous occasion for Charles, and he would want his son to be at the coronation to witness it. He would like to have Harry back in the family. If they don’t sort it out, it will always be part of the King’s reign and how he has left his family disjointed. He has had a reputation as a distant parent, and it would be awful for him for that to continue.”

source: people.com