What happens in a nativity?

The birth of the Lord and Saviour Jesus Christ.It tells us how Mary of Nazereth was told by the Angel Of The Lord, Gabriel, that she would have a baby and to name Him Jesus. Mary married Joseph. In time they traveled to Bethlehem on an donkey where they came to an inn. There was no room so they had to stay in the barn outside. Later that night Mary gave birth. Jesus was put in a manger. We celebrate Christmas to commemorate the birth of our Lord and Savior, Jesus Christ.