It’s Valentine’s Day today and we celebrate love. But why, exactly, do we do that? What are the origins of Valentine’s Day? History.com has some interesting theories to offer.

One theory is that Valentine was a priest who served during the third century in Rome. When Emperor Claudius II decided that single men made better soldiers than those with wives and families, he outlawed marriage for young men. Valentine, realizing the injustice of the decree, defied Claudius and continued to perform marriages for young lovers in secret. When Valentine’s actions were discovered, Claudius ordered that he be put to death.

Why February 14th?

While some believe that Valentine’s Day is celebrated in the middle of February to commemorate the anniversary of Valentine’s death or burial—which probably occurred around A.D. 270—others claim that the Christian church may have decided to place St. Valentine’s feast day in the middle of February in…