who is allowed to wear white when visiting the pope
Privilège du blanc A reigning Catholic queen or princess retains this privilege at the discretion of the Pope, by remaining a Catholic in good public standing, through marriage to another Catholic monarch, or simply by grant of the Pope at his dispensation.[citation needed] Catholic royalty may freely choose whether to exercise the privilege depending on the importance of occasion; if they don't, this is termed as "declining the privilege"[citation needed], and the fact of choosing to wear black garments at certain points of Papal audiences does not negate her privilege to be dressed in white.
When in Rome, do as the Romans do When in Rome, do as the Romans do[1] (often shortened to when in Rome...)[2] or a later version when in Rome, do as the Pope does,[3] a proverb attributed to Saint Ambrose, means that it is advisable to follow the conventions of the area in which you are residing or visiting.[1]