The Star of David is a six-pointed star formed by two interlocking triangles, one pointing up, one pointing down. It is named after King David and appears on the flag of Israel. While predominately recognized as a symbol of Judaism and Israel, many Christians identify with the Star of David as well.
The five-pointed star is also a symbol of Christianity associated with the birth of the Savior, Jesus Christ. In Matthew 2 the Magi (or wise men) followed a star toward Jerusalem in search of the new born King. From there the star led them to Bethlehem, to the very location where Jesus was born. When they found the child with his mother, they bowed and worshiped him, presenting him with gifts.
In the Book of Revelation, Jesus is called the Morning Star (Revelation 2:28; Revelation 22:16).