And they came with haste,
and found Mary, and Joseph,
and the babe lying in a manger.
Luke 2:16
"Blame St. Francis of Assisi, who is credited with staging the first nativity scene in 1223. The only historical account we have of Francis’ nativity scene comes from The Life of St. Francis of Assisi by St. Bonaventure, a Franciscan monk who was born five
years before Francis’ death.
According to Bonaventure’s biography, St. Francis got permission from Pope Honorious III to set up a manger with hay and two live animals—an ox and an ass—in a cave in the Italian village of Grecio. He then invited the villagers to come gaze upon the scene while he preached about “the babe of Bethlehem.”
Bonaventure also claims that the hay used by Francis miraculously acquired the power to cure local cattle diseases and pestilences.
Nativity buffs will know, however, that the familiar cast of characters relied upon today—the three wise men and the shepherds—is not biblically accurate.
Of the New Testament’s four gospels, .... Matthew mentions wise men, while Luke comments on shepherds. But nowhere in the Bible do shepherds and wise men appear together. What’s worse, no one mentions donkeys, oxen, cattle or other farmyard friends in conjunction with Jesus’ birth."
Smithsonian