The Royals hosted Pope Leo, 70, in a ceremony at the Royal Palace in Madrid, marking the first papal visit to the country since Benedict XVI visited in 2011.
The eldest daughter of King Felipe VI and Queen Letizia of Spain, 20, donned full military attire as she attended the awarding ceremony at the San Javier Town Hall.
On Monday, Charlene, 48, and her husband, Prince Albert, were welcomed by Felipe and Queen Letizia at the Palace of Zarzuela in the Spanish capital for their first ever official visit.
Queen Letizia and her daughters Princesses Leonor, 19, and Sofía, 18, have used sign language in a sweet video from a Marivent Palace reception in Majorca.
Infanta Sofía of Spain has graduated from Hippie Hogwarts after completing two years of International Baccalaureate studies at the Welsh boarding school popular with European royals.