PHILADELPHIA –– Global attention will turn to Philadelphia in 2015 when the city expects to welcome hundreds of thousands of families for the World Meeting of Families — and possibly the new pope.

Philadelphia Archbishop Charles J. Chaput led a morning news conference Feb. 25 to announce that the Vatican confirmed earlier in the day the long-anticipated selection of Sept. 22-27, 2015, as the date for the gathering of families, Catholic and non-Catholic, from around the world.

He thanked Pope Benedict XVI "for choosing Philadelphia and for setting these dates before he concludes his ministry as pastor of the universal church."

The pope will resign from his ministry the evening of Feb. 28, and a conclave to choose his successor will begin soon thereafter.

The last World Meeting of Families was held in Milan in 2012 and drew 350,000 people for events supported by 5,300 volunteers. On the closing day, more than 1 million attended Mass celebrated by Pope Benedict.

Events of this magnitude "demand a great deal of planning and work," Archbishop Chaput said. "They draw many thousands of people –– in this case, many thousands of families with children of all ages. But these events also become moments of grace.

"They have the power to transform, in deeply positive ways, not just the spirit of Catholic life in our region, but the whole public community. We're excited to begin this journey."

The World Meeting of Families began in 1994 at the behest of Pope John Paul II. It is held every three years has since grown to attract thousands of families for days of events –– capped by the final day's celebration of Mass by the pope.

The Philadelphia event will be the first to be held in the United States. Workshops and conferences are expected to discuss many facets of contemporary family life to strengthen and support it.

"The World Meeting of Families is meant to be a gift not just to Catholics in Philadelphia, but to every person of good will in the commonwealth of Pennsylvania and surrounding areas," Archbishop Chaput said.

"Everyone with a generous heart is welcome to be a part of it," he continued, "and I'll be working closely with my brother bishops in the months ahead to encourage families across the United States and Canada and around the world to come to Philadelphia in September 2015."

While the archbishop did not know how many would attend the five-day event, he said he and planners would gauge attendance at previous meetings and make an estimate for Philadelphia. The event is expected to draw families from across the eastern United States and other regions, plus Canada and Mexico and throughout the world.

One thing he was sure of was that the cost for hosting the meeting will be high. He estimated the World Meeting of Families event in Milan cost more than $13 million in U.S. currency.

"I'll be responsible for raising that money," Archbishop Chaput said. He mentioned the Philadelphia Archdiocese's financial difficulties, which led to administrative downsizing and layoffs last year, and that he expected to raise the necessary funds for the meeting "from outside sources" and with the help of a fundraising group that he did not name.

The archbishop also said he didn't know why Pope Benedict chose Philadelphia for the event –– "His Holiness didn't tell me," he said –– but noted some good reasons.

The city is seen as the starting point for the United States and the foundation of its political ideals, including human freedom and especially religious freedom, which Pope Benedict mentioned during his 2008 visit to the U.S.

Calling Philadelphia "an American Catholic icon" boasting two saints –– St. John Neumann and St. Katharine Drexel –– he also noted the archdiocese's more recent struggles concerning the clergy sexual abuse crisis.

The Catholic Church in Philadelphia "is also a community in need of healing and renewal," Archbishop Chaput said. "We have a very serious duty to help persons who have been hurt in the past to heal, and to better protect children and young people moving forward.

"Beyond this important duty, though, the church still has the obligation to preach Jesus Christ. She still has the duty to help people find God and to live their faith with joy and conviction."

Joining the archbishop at the news conference was Philadelphia Mayor Michael Nutter. He and Pennsylvania Gov. Tom Corbett have been named honorary co-chairs for the event by Archbishop Chaput.

Neither Nutter nor the archbishop would confirm locations of events, but the mayor was confident that city services would be able to handle the expected visitors. He was also excited about the opportunity to show off the city on a worldwide stage.

"This will elevate Philadelphia as one of the great international cities in the world," Nutter said. "We're more than prepared to handle this logistically. We'll be able to pull this off in magnificent fashion."

Himself a product of Catholic education at St. Joseph's Preparatory School and the former Transfiguration of Our Lord School in Philadelphia, Nutter said the significance of a focus on family life extends beyond the Catholic community.

"Family is the cornerstone of society and strengthening it serves all of our people in Philadelphia –– Catholic and non-Catholic alike," he said. "A focus on the family will help this city. We want to reach out to the religious community, to the clergy. All of us need prayer, all of us need healing."

Archbishop Chaput speculated that a new pope, who will be elected by the College of Cardinals in Rome likely in coming weeks, would visit Philadelphia as the capstone to the World Meeting of Families event by celebrating Mass on the concluding day, Friday, Sept. 27.

Gambino is director and general manager of CatholicPhilly.com and PhaithMagazine.com, the news and magazine websites of the Philadelphia Archdiocese.