Valentine, realizing the injustice of the decree, defied Claudius and continued to perform marriages for young lovers in secret. When Valentine's actions were discovered, Claudius ordered that he be put to death.
Other stories suggest that Valentine may have been killed for attempting to help Christians escape harsh Roman prisons, where they were often beaten and tortured.
According to one legend, an imprisoned Valentine actually sent the first “valentine” greeting himself after he fell in love with a young girl—possibly his jailor's daughter—who visited him during his confinement.
Before his death, it is alleged that he wrote her a letter signed “From your Valentine,” an expression that is still in use today. Although the truth behind the Valentine legends is murky, the stories all emphasize his appeal as a sympathetic, heroic and—most importantly—romantic figure.