Prince Albert II of Monaco and his wife Princess Charlene were received in a private audience by Pope Benedict XVI at the Vatican on January 12, 2013. The meeting took place at the Pope’s library. It is interesting to note whether Princess Charlene was granted the privilege du blanc as she wore a white dress and veil. The privilege du blanc whereby women may wear white when meeting with the Pope is a privilege granted to wives of Catholic monarchs and female Catholic monarchs. Among those eligible to exercise this privilege today are the Queens of the Belgians and of Spain, and the Grand Duchess of Luxembourg. When Princess Grace visited Vatican City and was received in audience by the Pope, she always wore black. While at the Vatican, Prince Albert and Princess Charlene also met with the Holy See’s Secretary of State, Tarcisio Cardinal Bertone. Photos by Getty Images and Corbis.