Christian celebrate Christmas in ancient Bethlehem church marking Jesus' birthplace

Latin Patriarch of Jerusalem Fouad Twal, center, holds the Baby Jesus as he and clergy arrive to pray at the Grotto, traditionally believed by Christians to be the birthplace of Jesus Christ, at the Church of the Nativity, in the West Bank town of Bethlehem, early Tuesday, Dec. 25, 2012. (AP Photo/Abed Al Hashlamoun, Pool) (The Associated Press)

Palestinian President Mahmoud Abbas, attends Christmas Midnight Mass at Saint Catherine's Church in the West Bank town of Bethlehem, early Tuesday, Dec. 25, 2012. (AP Photo/Abed Al Hashlamoun, Pool) (The Associated Press)

Latin Patriarch of Jerusalem Fouad Twal, center, holds the Baby Jesus in Saint Catherine's Church at the end of the Christmas Midnight Mass and leads the procession to the Grotto, traditionally believed by Christians to be the birthplace of Jesus Christ, at the nearby Church of the Nativity, in the West Bank town of Bethlehem, early Tuesday, Dec. 25, 2012. (AP Photo/Abed Al Hashlamoun, Pool) (The Associated Press)

Pilgrims celebrate Christmas Day Mass in the ancient Bethlehem church where tradition holds Jesus was born, candles illuminating the sacred site and joyous prayer filling its halls.

Worshippers lined up Tuesday inside the fourth-century Church of the Nativity complex, waiting to see the grotto that is Jesus' traditional birthplace.

Duncan Hardock, a 24-year-old teacher from MacLean, Virginia, says he got to see "both sides of Bethlehem" as he arrived at Manger Square after passing through the separation barrier Israel built to ward off West Bank attackers.

Later, Pope Benedict XVI will deliver his Christmas message from the central balcony of St. Peter's Basilica to thousands of pilgrims, tourists and Romans gathered in the piazza below. The "Urbi et Orbi" message is traditionally a review of world events and global challenges.