The wardrobe that leads to Narnia in C.S. Lewis's novel The Lion, the Witch and the Wardrobe is simply the wardrobe.
Lucy Pevensie discovers it while exploring the rooms of an old country house during the Second World War. At first, the wardrobe seems to be an ordinary piece of furniture, but Lucy walks beyond its coats and enters a snowy forest in another world. She later returns with her siblings Peter, Susan, and Edmund, making the wardrobe the story's gateway between England and Narnia.
The wardrobe is based on a distinctive premise: an everyday object can conceal an entire realm. The novel does not name the furniture with a special magical title, so answers such as “the portal” describe its function rather than giving its canonical name. The wardrobe remains important even after the children learn more about Narnia, because it links their ordinary life with their extraordinary adventure.
Lewis published the book in 1950 as the first volume of the original publication order of The Chronicles of Narnia.