MADRID (AP) — Pope Leo XIV challenged Europe to acknowledge Christianity’s contributions to its cultural identity Sunday, as he presided over a Mass in Madrid attended by more than a million people and honored Spain’s centuries-old traditions of religious devotion and culture.

Leo celebrated Spain’s Christian roots and culture with the huge morning Mass in downtown Madrid and an evening spectacle that featured flamenco dancers, classical guitar and a moving meditation by Spanish actor Antonio Banderas on art, faith and beauty.

In his remarks, Leo challenged Europe to consider what the continent’s identity would be without the influence of Christianity. He cited its art, culture and the role played by Christians — “motivated by their faith” — to build its schools, hospitals and other institutions.

“Is it seriously possible to believe that Europe — which we deeply love — would be the same without the influence of faith?” Leo asked, in demanding that religious expression be allowed to keep its place in the public sphere.

A morning Mass and procession on floral carpets

Leo, who arrived in Spain on Saturday at the start of his weeklong visit, has been keen to highlight the long tradition of Christian culture and devotion here to encourage especially young generations to find their faith. It’s a tall order in a once-staunchly Catholic country where religious observance has largely been on the wane.

Sunday fell on the Catholic Corpus Domini feast day, which often features processions of faithful through towns and cities led by a priest carrying the Eucharist. In Spain, as in other predominantly Catholic countries, the processions often feature elaborate floral carpets arranged along the route.

During Sunday’s Mass, Leo said that the floral carpets express the “spiritual sentiments of this country” through “altars erected in the streets.”

“This is not an exhibition, a remnant of folklore or a simple display of beauty,” he said. “It is a profession of faith in the presence of the risen Lord, who is alive and continues to walk among us.”

He said that the continued observance of such devotional practices points to what Spain can and should be for the world.

“Herein lies the task of Spain today and in the future: to ensure that the religiosity which has shaped and defined this country for centuries is not a museum of the past to be visited, but a school of faith from which to draw even today,” he said.

At the end of the Mass, Leo carried a gilded monstrance, or container, holding a Eucharistic host and walked over some of the 16 floral carpets that decorated the half-kilometer (less than half-mile) procession route, as children dropped additional petals before him and the crowd tossed petals from behind the barricades.

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Leo’s visit to the country of 50 million has drawn huge crowds, with a vigil service Saturday night. drawing an estimated 600,000 young Spaniards. They knelt for several minutes in silent prayer alongside Leo, suggesting that there is indeed interest in the faith among young people, despite Spain’s heavily secularized society.

On Sunday, their numbers doubled: Organizers said that 1.2 million people had turned out on a brilliant spring morning for Leo’s Mass at Madrid’s iconic Plaza de Cibeles and surrounding streets, with more trying to get in.

“It’s spectacular,” said Julián Tapiador, a consultant who came to the Mass. “I’m so proud that the pope is in Spain after 15 years. Hopefully he comes again and we can all see him again.”

Octavio Puche, a retiree, thanked Leo for making the trip.