PHILADELPHIA — The message was a soft sell, but it couldn't be plainer: "Thanks for coming, Archbishop, now can you talk Pope Francis into coming too?"

The occasion was a May 14 student assembly in the gymnasium of center city Philadelphia's Roman Catholic High School whose boys combined with girls from nearby John W. Hallahan Catholic Girls High School to welcome Archbishop Vincenzo Paglia, president of the Pontifical Council for the Family.

The archbishop dropped in during a whirlwind visit to Philadelphia as part of a preliminary tour in conjunction with the World Meeting of the Families to be held in the city Sept. 22-27, 2015.

First up on the welcoming committee was Maci Torres, a spritely sophomore from Hallahan who told the archbishop, "The theme just announced, 'Love is Our Mission: the Family Fully Alive,' is one that makes an impact on all of us.

"The authentic love illustrated by Christ in the Gospel is at the heart of Catholic education, and this is why we look forward to sharing in the World Meeting of Families in 2015. We are excited to introduce our family here in Philadelphia to the entire world."

She asked the archbishop to take an important message back to Rome: "Pope Francis, please come to Philadelphia for the World Meeting of Families."

Next up was Roman sophomore Matthew Anticoli, who delivered his entire message in fluent Italian to the obvious delight of Archbishop Paglia.

"Tough to follow," murmured the next speaker, Christopher Mominey, the archdiocese's secretary for Catholic education.

He also addressed the archbishop in Italian but then translated for the general public, reiterating the invitation to Pope Francis tendered by the students.

"Please extend to our Holy Father, Pope Francis, our deepest esteem and affection," Mominey said. "We know that he often asks other people to pray for him, and we are, and we hope to say that in person in September of next year. Our families across the archdiocese will be actively supporting the work of the World Meeting of Families and we will do everything in our power to be sure this event will reflect what we believe."

For his part, Archbishop Paglia assured the gathering, "I will tell the Holy Father it will be impossible for him to stay in Rome." But as a practical matter, he urged the students to write directly to Pope Francis "in your own words," he said. "I will be your mailman."

At a news conference the day before, Philadelphia Archbishop Charles J. Chaput said he does not expect the pope to announce whether he will come to Philadelphia next year until about March. But the international meeting is being planned as though the pope will attend, he added.

Archbishop Paglia in addressing the high school students invited them to serve as volunteers at the World Meeting of Families. "You can help us, apply your energy," he said.

Philadelphia Mayor Michael Nutter, who in March was part of the Philadelphia delegation to visit Rome for an audience with Pope Francis as part of the preparation for the World Meeting of Families, was also at Roman Catholic's assembly.

Nutter recalled how thrilled he was to actually meet Pope Francis. He was given a picture of the event taken by a Philadelphia Daily News photographer, which he had framed and gave to his mother for Mother's Day. "She and her twin sister are graduates of Hallahan," said the mayor, himself a graduate of a Catholic high school in the archdiocese.

The choice of Roman and Hallahan students to welcome Archbishop Paglia was fitting because they are the two oldest archdiocesan high schools in Philadelphia and also because of their proximity to the Cathedral Basilica of SS. Peter and Paul, the Benjamin Franklin Parkway and the Pennsylvania Convention Center where most of the events will occur.

"It was a great honor to have him here and the enthusiasm was overwhelming," said Robert O'Neill, Roman's principal. "Next year we will be celebrating our 125th anniversary and to have the pope here is absolutely fantastic. The kids are just thrilled. This was the flagship diocesan high school for the whole country."