I have an old Hallmark Valentine card with the story of one of these martyrs. Since I do not have time to put the story into my own words, I will begin it below from a website I found it on. This is the exact same version word for word of the story of St. Valentine that is on my card.
Story of St. Valentine
"The story of Valentine's Day begins in the third century with an oppressive Roman emperor and a humble Christian Martyr. The emperor was Claudius II. The Christian was Valentinus.
Claudius had ordered all Romans to worship twelve gods, and had made it a crime punishable by death to associate with Christians. But Valentinus was dedicated to the ideals of Christ; not even the threat of death could keep him from practicing his beliefs. He was arrested and imprisoned.
Claudius had ordered all Romans to worship twelve gods, and had made it a crime punishable by death to associate with Christians. But Valentinus was dedicated to the ideals of Christ; not even the threat of death could keep him from practicing his beliefs. He was arrested and imprisoned.