As was often the case, Milles frequently played with his sculptures and developed, divided, and reused a theme. The horse’s head is an example where he took a part of a larger sculpture and, in doing so, created an additional artwork.
Carl Milles created the equestrian statue of Folke Filbyter for Linköping, where the sculpture is part of the Folkung Fountain at the main square (Stortorget). The author Verner von Heidenstam, a close friend of Carl Milles, wrote about Folke Filbyter and his relatives in the Folkung dynasty in his book The Tree of the Folkungs (Folkungaträdet).
Carl Milles used this story and selected a passage in which Folke Filbyter goes in search of his lost grandchild. Riding his horse, he crosses a stream where the horse slips on the slick stones, creating the dramatic movement. The horse and rider twist in opposite directions in an attempt to regain their balance. The base of the sculpture features historical scenes in relief from the Middle Ages, with connections to the history of the Folkung dynasty.
From a young age, Carl Milles spent a great deal of time studying animals. In Paris, he often visited the Jardin des Plantes, a zoological garden. He studied animals in great detail—their movements and how they interacted with each other. It was common for Milles to include animals in his monumental sculptures throughout his life. He was fascinated by both exotic animals and European species.