Pierre Casiraghi and wife Beatrice Borromeo arrive to attend a Mass, at the Monaco Cathedral during the Monaco National Day Celebrations, on November 19, 2015 in Monaco, Monaco. (Photo by Stephane Cardinale/Corbis via Getty Images)
Pierre Casiraghi and wife Beatrice Borromeo arrive to attend a Mass, at the Monaco Cathedral during the Monaco National Day Celebrations, on November 19, 2015 in Monaco, Monaco. (Photo by Stephane Cardinale/Corbis via Getty Images)