15 times the Royals have worn a head covering to show respect Camilla wore a head scarf to visit a mosque on Wednesday 8 April 2021 • 5:00am The Duchess of Cambridge, the Duchess of Cornwall and Diana, Princess of Wales wearing head coverings Credit: Getty ‘Protocol’ and ‘unspoken dress codes’ are terms which are never far away when it comes to explaining why royals dress the way they do. You might assume that there is a rule book full of exacting guidelines about hem lengths, acceptable nail varnish colours and the importance of hosiery. In fact it is more of an instinctive practice, the boundaries constantly realigned to allow for personal tastes and ever-changing trends and norms.