Widely recognized as a symbol for love and affection, the heart shape has evolved over centuries.
Have a Heart: The History of a Much-Loved Shape - Rapaport
Heart Symbolism + History – ALEX AND ANI
A History of the Heart Symbol — ThreadWritten
Collective Hearts Journal
He(art) and Design: The History Behind The Heart Symbol — WePropagate
Heart-Shaped Books: History and Tutorials - iBookBinding - Bookbinding Tutorials & Resources
What Is the Origin of the Heart Symbol?
How did the Heart Become the Symbol of Love anyway?
Here's where the heart shape actually comes from