C.S. Lewis’s childhood imaginary country was called Boxen.
Lewis and his brother Warren created Boxen when they were children, combining the earlier imaginary lands of India and Box. They developed elaborate histories, governments, newspapers, and animal characters for this fictional world. Warren’s drawings and Lewis’s writings helped give Boxen a substantial internal history.
Boxen is distinct from Narnia, the later fantasy world Lewis created for his published children’s books. Narnia contains talking animals, magical objects, and Christian symbolism, whereas Boxen was primarily a private childhood exercise in world-building and storytelling.
The Boxen material became known more widely after Lewis’s death, when some of the brothers’ childhood writings and illustrations were published. It is valuable evidence of how early Lewis’s interest in invented worlds began.