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.

Pope Francis had a previously unannounced meeting at the Vatican on Wednesday afternoon with Britain's King Charles and Queen Camilla, during their state visit to Italy, Buckingham Palace and the Vatican announced.

Queen Camilla wore black to meet Pope Francis at the Vatican, but why can Princess Charlene and other royal women wear white? All about the royal rule and fashion choices past.