Princess Charlene of Monaco and her husband Prince Albert attended Pope Leo XIV’s papal inauguration mass on Sunday in St. Peter’s Square. While she had worn all-black to the inaugural mass of Pope Francis in 2013, she chose all white for Sunday’s event—she is one of a few women who can wear all-white in the audience of the pope, holding to traditions steeped in historical protocols.

Charlene chose a white midi-length dress from Elie Saab for the event. The dress included demure long sleeves as well as a scalloped hem. The fabric features white embroidery, giving the simple design depth and texture. She also carried a small clutch from Akris. She finished off the look with a customary white veil as well as a pair of classic pointed-toe stiletto pumps.

Only seven women in the world are allowed “the privilege of the white” while in the presence of the pope. While she did not exercise that right at the mass of Pope Benedict, Charlene did later wear white to meet with him privately.

That same tradition is extended to Catholic queens and consorts. Charlene became the Princess of Monaco in 2011 through her marriage to Prince Albert and converted to Catholicism before her marriage. Prior to the inauguration of Pope Francis, Charlene wore white to a private meeting with Pope Benedict XVI at the Vatican in January 2013. She then wore the hue again for a 2016 meeting with Pope Francis.

Women are largely expected to wear a matching mantilla, a lace veil, while in the pope’s presence.

Other attendees to the inaugural outdoor mass of Pope Leo included U.S. Vice President JD Vance and his wife Usha Vance, Grand Duchess Maria Teresa and Grand Duke Henri of Luxembourg as well as King Felipe VI of Spain and Queen Letizia of Spain. Usha Vance wore all-black, including her mantilla.

Pope Leo made history on May 8 as the first American to hold the role.