Sankt Valentin is the patron saint of snake charmers and the lonely.
A grieving mother, who found a snake curled upon the headstone of her dead daughter, prayed to Sankt Valentin at the church. Sankt Valentin told her to go to the grave and lie down on the ground beside the snake, promising that all would be revealed. The grieving mother was terrified, but Sankt Valentin told her that she could choose either faith or fear. The woman heeded Sankt Valentin's words and discovered that her daughter's fiancé had poisoned his bride; the girl's spirit lived on in the form of the snake.
Thanks to this tale, it is customary for the mothers of brides to pray to Sankt Valentin, and seeing a snake on one's wedding day is considered a sign of luck.