King Charles and Queen Camilla paid a surprise visit to Pope Francis as he recuperates at the Vatican on Wednesday during a state visit to Italy that coincided with the British royal couple’s 20th wedding anniversary.

As their majesties continue their tour of Italy, a royal commentator provides insight into how they have made their 20-year marriage work.

Queen Camilla says that King Charles "loves his work and it keeps him going" and that as his health is "getting better… now he wants to do more and more". The King has been receiving cancer treatment for over a year, but this week he successfully completed an intensive schedule of public events on a four-day state visit to Italy.