He was born in 176 AD in the city of Terni, in Umbria, Italy.
During his life, he was once on house arrest with a man named Judge Asterius. The judge presented St. Valentine with his blind daughter. He told St. Valentine that if he restored her sight, the judge would do anything for him. St. Valentine put his hands on the child's eyes and restored her vision. Judge Asterius broke all the idols in his house, fasted for three days, and became baptized with his family and whole household.