The White Witch rules Narnia in C.S. Lewis’s Chronicles of Narnia.
Narnia is the central fictional country of Lewis’s seven-book series. In The Lion, the Witch and the Wardrobe, the White Witch has imposed a winter that does not end and presents herself as the land’s queen. Her rule is challenged by Aslan and by the human children who enter Narnia from our world.
Readers sometimes confuse Narnia with Calormen or Archenland, which are separate countries in the wider fictional world. Calormen lies to the south and has its own culture and ruler, while Archenland is a neighboring kingdom associated with Narnia.
Narnia is also the name of the larger world in some casual descriptions, but more precisely it is a country within the world Lewis created. The world itself contains additional lands, including Telmar and the eastern regions reached in The Voyage of the Dawn Treader.