Pope Canonizes 4 Nuns, Including 2 Palestinian Nuns

Pope Francis celebrates a canonization ceremony of four new saints in St. Peter's Square at the Vatican, May 17, 2015. Sisters Mariam Bawardy and Marie Alphonsine Ghattas were among four sisters who were made saints at a Mass in a sun-soaked St. Peter's Square.

Pope Francis arrives to celebrate a canonization ceremony of four new saints in St. Peter's Square at the Vatican, May 17, 2015.

A nun carries a relic of the St. Mariam Baouardy Haddad as Pope Francis leads a ceremony for the canonization of four nuns in the Vatican City, May 17, 2015.

A Palestinian flag waves in front of a tapestry of Mariam Baouardy Haddad before Pope Francis leads a ceremony for the canonization of four nuns at Saint Peter's square in the Vatican City, May 17, 2015.

Palestinian President Mahmoud Abbas (front row, on L) applauds during a ceremony for the canonization of four nuns at Saint Peter's square in the Vatican City, May 17, 2015.

Pope Francis greets faithful in St. Peter's Square at the Vatican, May 17, 2015.

Pope Francis greets Palestinian President Mahmoud Abbas following a canonization ceremony in St. Peter's Square at the Vatican, May 17, 2015.

Pope Francis greets a child in St. Peter's Square at the Vatican, May 17, 2015.

Nuns attend the canonization ceremony of four new saints led by Pope Francis in St. Peter's Square at the Vatican, May 17, 2015.