Princess Charlene and her husband, Prince Albert II, stepped out in Vatican City on Monday morning for an official visit with Pope Francis.
It's the fourth visit to the small country for the wife of Monaco's monarch: She previously met Pope Benedict in 2013.
Wearing all-white – she's only one of seven people worldwide who are allowed to wear the color to meet His Holiness – Charlene stunned in a collarless white coat and a cream dress paired with a white lace head covering.
Franco Origlia / Getty
The exclusive tradition of wearing white to meet the pope is reserved for Catholic queens and princesses at important events, such as canonizations or private audiences, like Charlene's today.
The other six women who hold the le privilége du blanc are Queen Sofía of Spain, Queen Paola of Belgium, Grand Duchess Maria Teresa of Luxembourg, Queen Mathilde of Belgium, Queen Letizia of Spain, Princess Marina of Naples.
The trip is a special one for reasons other than fashion, too. The visit between the world's two smallest countries, Monaco and Vatican City, is a sentimental one for Charlene, who converted to Catholicism after her July 2011 wedding.
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A source told PEOPLE that converting to Catholicism was a decision "of her own free will and choice" and continues to inspire her.
"Catholicism is the state religion [in Monaco]," Charlene has said. "But for me, it represents much more. The values of this religion profoundly touch me and correspond perfectly to my spirit."
It's also Charlene's first state visit since the birth of the couple's twins, Prince Jacques and Princess Gabriella, in December 2014.