http://www.americancatholic.org/Features/ValentinesDay/origins.asp

http://www.catholic.org/saints/saint.php?saint_id=159

http://www.newadvent.org/cathen/15254a.htm

http://www.catholic.com/quickquestions/who-was-st-valentine-and-how-did-his-feast-day-of-february-14-come-to-be-regarded-as-