The institutional meeting took place in the hall of the Palacio de Cibeles, shortly before the Pontiff headed to the square to preside over a massive mass. The event was attended by the King and Queen of Spain and their daughters, who welcomed the head of state of the Vatican upon his arrival.

The Golden Key, a piece of goldsmithing that recreates the ancient keys of the city wall, symbolizes the hospitality and trust of the people of Madrid towards international leaders. This recognition follows the city's tradition of honoring prominent figures visiting the capital on official trips.

After the exchange of gifts, the Pope moved to the square, where nearly one million people are expected to gather. The religious ceremony features a 600-square-meter altar and the participation of thousands, including authorities, priests, and the faithful.

The mass was attended by various officials, including the president of the Comunidad de Madrid, the minister of Education, Vocational Training and Sports, as well as representatives from major national political parties.