The King and Queen will mark their 20th wedding anniversary on Wednesday by spending the evening as guests of honour at a state banquet in Rome.

The black-tie dinner, a highlight of the couple’s four-day state visit to Italy which begins on Monday, will be attended by prominent figures from Italian society.

The day will mark two decades since Charles and Camilla wed at Windsor Guildhall on April 9, 2005.

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The King and Queen are set to begin their three-day trip to Italy on Monday after his hospital stay last week.

The historic visit will see Charles become the first British sovereign to address both houses of the Italian parliament and he is also set to hold audiences with Italy’s president Sergio Mattarella and prime pinister Giorgia Meloni.

The monarch was also due to visit Pope Francis at the Vatican, but this was postponed because the Pope was advised to have “extended period of rest and recuperation” after surviving a five-week, life-threatening bout of pneumonia.

Charles has faced his own health concerns in recent weeks. He was forced to postpone his engagements last Friday following a short stay in hospital after experiencing side effects from his cancer treatment.