Mary was a young and God fearing lady, she was a virgin. An angel appeared to Mary and told her she was going to conceive a son and that the son was God’s child. Mary explained to her husband to be, he felt betrayed and did not believe her until one night in his sleep an angel appeared to him and explained to him what Mary said was true that she would bear a child and the child was from God. Joseph and Mary went to Bethlehem for registration when the baby was due, Joseph looked for space but there was none, they had no choice than to use a manger. So Jesus was born in a manger.