Narnia is the fictional country created by song at the beginning of C.S. Lewis’s The Magician’s Nephew.
In the novel, Aslan sings Narnia into existence, causing stars, plants, and animals to appear in the newly formed world. The scene serves as the creation story for the setting used throughout The Chronicles of Narnia. The Magician’s Nephew was published in 1955, although it is sixth in the original publication order.
The book follows Digory Kirke and Polly Plummer as they travel between worlds using magical rings. Their journey also explains the origin of the wardrobe and introduces Jadis, who later becomes the White Witch. Digory’s actions connect the events of the creation story to the later adventures of the Pevensie children.
Archenland and Calormen are neighboring countries within the wider Narnian world, while Telmar is associated with the later history of Narnia. They are not the country Aslan creates in the opening sequence.