King Charles, Queen Camilla and Prince William took part in one of Scotland's oldest royal traditions on Wednesday as they attended the annual Order of the Thistle Service at St Giles' Cathedral in Edinburgh.
The King and Queen were joined by the Prince of Wales, known in Scotland as the Duke of Rothesay, and the Duke of Edinburgh for the centuries-old ceremony, with members of the Royal Family wearing the Order's distinctive ceremonial robes and insignia.
The Royal Family shared a collection of photographs from the event on its official Instagram account, highlighting the significance of the annual service.
"The King and Queen, joined by The Duke of Rothesay and The Duke of Edinburgh, have attended the Thistle Service at St Giles' Cathedral," the post read.
It added, "The Most Ancient and Most Noble Order of the Thistle is the greatest order of chivalry in Scotland, recognising sixteen Knights and Ladies with the highest honour in the country."
The post concluded by noting that King Charles serves as Sovereign of the Order and that appointments are made in recognition of men and women who have made significant contributions to Scotland's national life.
The Order of the Thistle is Scotland's highest order of chivalry and remains one of the country's most distinguished royal honours. The annual service at St Giles' Cathedral is a longstanding fixture of Holyrood Week, the monarch's annual programme of official engagements in Scotland.
