More than a million people filled a central Madrid plaza on Sunday for Pope Leo XIV’s principal Mass and a procession showcasing one of Spain’s most iconic expressions of popular piety: elaborate flower carpets.
Cheering “This is the youth of the pope!” the crowd lined the route as Leo traveled around the plaza and surrounding streets in his popemobile, with several rows of spectators behind barricades.
The Mass coincided with the Catholic feast of Corpus Domini, a day traditionally marked by processions in which a priest carries the Eucharist through towns and cities. In Spain, these processions are often accompanied by intricate floral carpets laid along the route.
Leo, who arrived in Spain on Saturday to begin a week‑long visit, emphasized the country’s long tradition of Catholic devotion, urging especially young people to deepen their faith.
During a vigil on Saturday night, an estimated 600,000 young Spaniards knelt in silent prayer alongside Leo, indicating genuine interest among youth despite Spain’s increasingly secular society.
“Let me take this opportunity to tell you all: never be afraid to consider a vocation to the priesthood, religious life, or other forms of service in the Church,” Leo told the assembled crowd.
Irati Valda and Javier Hormazal, a young couple, displayed a cardboard sign announcing their upcoming wedding on June 13 and were invited close to receive Leo’s blessing during the vigil.
“Seeing so many young people together is incredible. Half a million people in silence—that’s a once‑in‑a‑lifetime experience,” Valda said.
Organizers reported that 1.2 million people attended the Sunday Mass and procession on a bright spring morning at Plaza Cibeles and the surrounding streets, with many more attempting to join.
The tradition of laying flower carpets—then tearing them up as the procession passes—dates back two centuries and is also popular in Latin America, where elaborate sand designs are created. The meticulous displays are offered as a tribute to the Eucharist.
Poland’s Corpus Domini flower carpets have been recognized by UNESCO, and Spain’s Galicia region is seeking similar acknowledgment for its tradition as part of the world’s intangible cultural heritage.
According to organizers, sixteen flower carpets covering the half‑kilometer procession route were prepared by a Galician florists association, using over 30,000 flowers—primarily yellow and white, the colors of the Holy See flag—and featuring motifs such as the papal keys.
Religious processions, pilgrimages, and feasts remain vibrant across Spanish regions. The most recognizable are the Holy Week processions during the final week of Lent, when brotherhoods and penitents parade ornate statues of Christ and the Virgin Mary through cities and towns, accompanied by marching bands. These events attract both devout participants and tourists.
Spanish towns and cities also regularly honor local patron saints with fiestas, and pilgrimages to shrines blend devotion with communal celebrations and music. In Andalusia, the El Rocío pilgrimage draws about a million people who travel on horseback and decorated wagons over Pentecost weekend to venerate an icon of the Virgin Mary.
Leo arrived in Spain on Saturday, urging the nation to move beyond polarization and work toward unity. On Sunday, he is scheduled to meet privately with members of his Augustinian order and address cultural leaders.