I’ve collected a few below:
NY Public Library’s collection of Vintage Valentines
Artists who use Hearts within their work:
Jim Dine Hearts
A Bundle of Pinterest Collections:
Alice Siegel Lots of heart lessons
Esther Orloff Incredible collection of Heart Art Ideas
Mona Lea Another Incredible collection
Maria Bowser Many ideas to inspire you here
Allie Lareson Assorted Sketchbook, 3D and creative creations here!
Jill Willems Numerous plans & lessons for kids
Jan Bellon Images of hearts from nature. Inspiration for digital art.