The fictional world visited by the children in C.S. Lewis’s Narnia books is Narnia.
Narnia is both the name of the central country and the name commonly used for the wider setting of The Chronicles of Narnia. Across the seven books, characters travel through forests, islands, seas, underground realms, and neighboring lands such as Calormen and Archenland.
The series presents Narnia as a world with its own creation story, history, talking animals, kings, queens, and magical objects. Aslan, a great lion, is its creator and supreme ruler. The setting is connected to Earth through unusual portals, including a wardrobe, magic rings, and a painting.
Readers sometimes use “Narnia” to mean the entire fictional universe, even though the books distinguish the country of Narnia from other lands and from the larger world. The books were published between 1950 and 1956 and remain Lewis’s best-known fiction.