A Mass in Metz was the final event of the pontiff’s Sept. 25–28 trip to France.

METZ, France — The wounds of violence in Europe’s recent past are opportunities to shine light on evil and build a future of harmony, Pope Leo XIV said on Monday.

At the last event of his trip to France, the pope celebrated Mass in the Metz Cathedral, a towering Gothic structure dedicated to St. Stephen and nicknamed “the Good Lord’s lantern” for its large expanse of stained glass — at nearly 70,000 square feet, the most of any medieval religious structure.

“It seems that the builders sought to minimize the walls — which remain solid — so that light might flood in abundantly to the faithful,” the pope said.

“As we contemplate these stained-glass windows, we learn that Europe’s future does not lie in uniformity but in the harmony of differences, where the wounds of the past become openings through which light shines,” he said.

The Vatican said 35,000 Catholics from Metz and the neighboring areas participated in the Mass both inside the cathedral and in the surrounding streets, watching large screens. Participants described taking a day off of work or school for the occasion.

“It’s great to be able to come celebrate peace and meet all the Christians who’ve come for the occasion, and to feel that we’re all together, united for the same cause and the same values,” 20-year-old fine arts student Humbeline Deville said.

“The fact that he chose this city … and that he did us the honor of coming here is truly important to us,” said Hassina Boulariah as she walked toward the city center almost four hours before the start of Mass.

Inside the cathedral, French President Emmanuel Macron and his wife, Brigitte, sat in the front row.

Metz, a city in northeastern France, sits just 27 miles from the Schengen tripoint, where the borders of Luxembourg, France, and Germany meet.

The Franco-German area is rich in significance for European history: It was annexed by the German Empire at the turn of the 20th century and later by Nazi Germany during World War II. Metz was also home to Robert Schuman, one of the founding fathers of the European Union.

In the Church, it is also remembered as the historical birthplace of Gregorian chant — “Metssine Chant” (also called “Metz singing”) — which developed during the eighth-century Carolingian Renaissance.

In his homily at Mass, Pope Leo recalled the history of the territory, especially the “fratricidal conflicts” that tore it apart.

Those who are from this land, he said, “know full well that it is not true that those who seek revenge are stronger than those who forgive.”

Leo said “it takes strength and great integrity not to be overwhelmed by evil, especially when the wounds inflicted are deep. However, in the face of injustice, humanity’s only path to salvation is a love that cares for others and seeks to give trust regardless of the circumstances, even when confronted with the most difficult behavior to accept.”

“In a world marked by so much violence, manipulation, and arrogance at various levels, Jesus teaches us how to transform deserts into oases, to plant gardens, and to build homes. He shows us the path that leads through forgiveness, mercy, and magnanimity,” he said.

Yvette Bisiaux pushed her adult daughter Sandrine Coquelet to the Mass in a wheelchair: “We live here, so we said, ‘Let’s go!’” she said.

Bisiaux added that she was “really moved” by the pope’s speech to the sick in Lourdes on Sept. 27. “I had tears in my eyes. It was so, so beautiful, so true.”

In his homily, the pontiff cited St. Augustine’s “The City of God,” noting that the bishop of Hippo “defined the peace of the heavenly city as a harmonious communion in which people find joy in God and in one another through him.”

St. Augustine “also described peace among people as the fruit of a “tranquillitas ordinis,” whereby each person recognizes and respects the unique and sacred dignity and role of others,” Leo added.

“Here in Metz, it is worth recalling that these are precisely the values upon which the Europe we know has been built over the centuries, with its spiritual and moral heritage preceding its economic and political heritage,” he said.

The pontiff recalled that it has never been easy to be faithful to these principles, including for those who came before us.

“Nevertheless, through faithfulness and perseverance, our ancestors bequeathed them to us as treasures to be passed on in turn to future generations, and enriched by our experience, the value of our efforts and our stories,” he said.

Before Mass, people awaiting the pope waved French or regional flags. German flags also dotted the crowds, which included enthusiastic scouts in uniform, older people seated on portable stools, and young adults embracing.

Some tired teenagers napped on the stone path of the historic outdoor market next to the cathedral.

The teens’ mother, Marion Bertagnolio, said it was worth it to take a day off from her job as a physics professor to attend the Mass.

“We are Catholics, and itʼs too important to me to come here to pray with him, to see him,” said Bertagnolio, who came with her husband and four of her six children, ages 10 to 19.

She said she hoped Leo could bring a message of peace to France, especially with presidential elections early next year. She also mentioned divisions with the country’s Catholic community, particularly over the Traditional Latin Mass.

“I hope [the pope’s] message will change our hearts” to be more united, she said.

This article was originally published by EWTN News English.