Valentine's Day has origins in both Christian and ancient Roman traditions. The pagan Lupercalia festival celebrated on February 15th was dedicated to Faunus, the Roman god of fertility and agriculture. Pope Gelasius later changed the date of the Christian feast of St. Valentine to February 14th in an effort to Christianize the Lupercalia festival. According to the video, one Valentine was a priest who secretly married young lovers despite the Roman emperor Claudius II banning marriage. Claudius II punished Valentine by imprisoning him, where Valentine fell in love with his jailor's daughter. Modern Valentine's Day is celebrated with gifts of roses, candy, cards, dinners and diamonds.