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Pope Francis, center beneath a baldachin, weds twenty couples in St. Peter's Basilica, at the Vatican, Sunday, Sept. 14, 2014. Forty "I do's", or "Si" in Italian, were pronounced in St. Peter's Basilica Sunday as Pope Francis married 20 couples, with one bride already a mother. Francis in his homily likened families to the "bricks that build society." (AP Photo/Alberto Pizzoli, pool) ( Vatican Pope Marriages )

Pope Francis holds the pastoral staff during a wedding ceremony in St. Peter's Basilica at the Vatican, Sunday, Sept. 14, 2014. (AP Photo/Alessandra Tarantino) ( Vatican Weddings )

Brides and grooms stand for their wedding ceremony celebrated as part of a mass by Pope Francis at St. Peter's basilica on September 14, 2014 at the Vatican. (ALBERTO PIZZOLI/AFP/Getty Images) ( DV1865731 )

A bride lays a bouquet during her wedding ceremony celebrated along with several couples as part of a mass by Pope Francis at St. Peter's basilica on September 14, 2014 at the Vatican. (ALBERTO PIZZOLI/AFP/Getty Images) ( DV1865740 )

Pope Francis delivers his blessing during a wedding ceremony in St. Peter's Basilica at the Vatican, Sunday, Sept. 14, 2014. (AP Photo/Alessandra Tarantino) ( Vatican Weddings )

Wedding couples sit inside St. Peter's Basilica as they are married by Pope Francis, at the Vatican, Sunday, Sept. 14, 2014. (AP Photo/Alberto Pizzoli, pool) ( Vatican Pope Marriages )

Pope Francis is framed by a balcony as he weds 20 couples in St. Peter's Basilica, at the Vatican, Sunday, Sept. 14, 2014. (AP Photo/Alberto Pizzoli, pool) ( Vatican Pope Marriages )

A bridal bouquet lays on a bench during a wedding ceremony celebrated as part of a mass by Pope Francis at St. Peter's basilica on September 14, 2014 at the Vatican. ( ALBERTO PIZZOLI/AFP/Getty Images) ( DV1865751 )

A bride and a groom participate in the wedding ceremony celebrated as part of a mass by Pope Francis at St. Peter's Basilica on September 14, 2014, at the Vatican. (ALBERTO PIZZOLI/AFP/Getty Images) ( DV1865749 )

Newly married couples attend a wedding ceremony led by Pope Francis in St. Peter's Basilica at the Vatican, Sunday, Sept. 14, 2014. (AP Photo/Alessandra Tarantino) ( Vatican Weddings )

A groom and a bride exchange rings during their wedding ceremony celebrated as part of a mass by Pope Francis at St. Peter's Basilica on September 14, 2014, at the Vatican. (ALBERTO PIZZOLI/AFP/Getty Images) ( DV1865748 )

Pope Francis, left, celebrates a wedding ceremony in St. Peter's Basilica at the Vatican, Sunday, Sept. 14, 2014. (AP Photo/Alessandra Tarantino) ( Vatican Weddings )

Guido Tassara, left, and Gabriella Improta, just married by Pope Francis, exchange rings during a wedding ceremony in St. Peter's Basilica at the Vatican, Sunday, Sept. 14, 2014. (AP Photo/Alessandra Tarantino) ( Vatican Weddings )

Pope Francis prays during a wedding ceremony in St. Peter's Basilica at the Vatican, Sunday, Sept. 14, 2014. (AP Photo/Alessandra Tarantino) ( Vatican Weddings )

Pope Francis leads the procession out of the church after a wedding ceremony in St. Peter's Basilica at the Vatican, Sunday, Sept. 14, 2014. (AP Photo/Alessandra Tarantino) ( Vatican Weddings )