How did Valentine's day arose?

The priest Valentine fought against the orders of Emperor Claudius II, who had forbidden the marriage during the war believing that the singles were better fighters. In addition to continuing celebrating marriages, he married secretly, despite the ban of the emperor. Having refused to renounce Christianity, Valentine was sentenced to death. While in jail awaiting the completion of his sentence, he fell in love with a jailer's blind daughter and miraculously restored her sight. Before leaving, Valentine wrote a farewell message to her, in which he signed as "Your Valentine." Considered a martyr for the Catholic Church, the date of his death - February 14 - also marks the eve of Luperce, annual festivals celebrated in ancient Rome in honor of Juno (the Goddess of women and marriage) and Pan (God of nature). One of the rituals of this festival was the parade of fertility, where the priests marched through the city knocking on all women with leather straps goat to ensure fertility. Another version says that in the seventeenth century, British and French began to celebrate Valentine's Day as the union of Valentine's Day. The date was adopted a century after in the United States, becoming the Valantine's Day.In the Middle Ages, it was said that on February 14 was the first day of mating birds. So lovers of the Middle Ages used this opportunity to leave messages of love on the doorstep of the beloved.