By Father Roger Landry, EWTN News - We live at a time in which Christmas crèches have become so much a part of Catholic piety that many believe that they must have existed from the first centuries of Christianity... But they are an “invention” of St. Francis of Assisi, who, 800 years ago this December, created a living Nativity in the mountainous Italian village of Greccio, located about halfway between Rome and Assisi. The topography and architecture of Greccio — where Francis would frequently stay to preach and to pray — reminded him of Bethlehem, which he had visited four years before.