"Saint" Valentine, as they call him, was martyred by the Roman Emperor for his Christian practice before 300AD and today, you can admire his skull in Rome! 

Though we are thankful for the saints God gives to his church, it's the Son of God who really brought Love. He was killed for his Faith too, but you won't find his remains in Rome, or anywhere, because He rose from the dead on the Sunday – the Day the Church celebrates Love! 

Come and admire "the glory of God in the face of Jesus Christ", 2 Cor 4:6