What Is the Origin of the Heart Symbol?

History offers various explanations from an ancient species of giant fennel to anatomical drawings in ancient medieval texts.
While Valentine's Day is shared by lovers sharing time together, one of the first Valentine cards was sent from an enemy prison.

The Mysterious Origins of the Enduring Heart Symbol - WSJ

A brief history of Korean finger hearts

The Origins of The Heart Might be Testicles, by Anthony Zataray

The History of the Heart Shape

How did the heart symbol come to look as it does, and of course

BBC Arts - BBC Arts - Matters of the heart: Where does the

Heart Coloring Pages (free printable PDF templates) - Life Should Cost Less

Hearts - My Favorite Shape

Where Does the Heart Shape Come From? - Origin of the Heart Symbol

A History of the Heart Symbol — ThreadWritten Textiles

Celtic Love Knot Meaning + 7 Old Designs