In the early days of Ireland, the Druids believed that they could see evil spirits coming when they carried a shamrock, or three-leaf clover, giving them a chance to get away in time! They thought four-leaf clovers offered magical protection, and warded off bad luck.
According to Christian legend, Eve is said to have carried a four-leaf clover with her when she left the Garden of Eden. That means that anyone who has one can claim to hold a bit of Paradise. Christians also viewed the four-leaf clover as lucky for its resemblance to the cross. Some even believe that the fourth leaf symbolizes the Grace of God.