From Aleteia:

On Wednesday evening, the fifth day of his apostolic journey to Spain, Pope Leo XIV visited the Sagrada Familia to celebrate Mass and then bless the Tower of Jesus Christ, which stands at more than 564 feet tall. Moving past standard tourist tropes, the Pope highlighted the basilica as a hub for popular catechesis deeply woven into the local neighborhood and the city of Barcelona.
At the end of the blessing, the Pope sat down beside the King and Queen for a truly impressive light and music performance led by the tender voices of a boys’ choir and a full symphony, and completed with drone-lights of Gaudí and fireworks.