It is from the Christians that we get the stories about Valentine's Day that most people have come to believe. One story is about a Christian man whose name sounded something like "Valentine." He lived around 250 A.D. At that time the Roman Emperor Claudius refused to allow any Roman soldiers to get married for any reason whatsoever.
Christian couples came to Valentine to be married. So Valentine would marry them in a Christian way. He was discovered and put in prison by the Emperor.One tradition says that he wrote notes to his friends by marking on leaves and then throwing them out the window of his prison. And the leaves were shaped like a heart.