Book Appearances: The Horse and His Boy The Last Battle
Movie Appearances: none yet
Overview: Calormen is the great southern empire bordering Narnia and Archenland, a major political and cultural force in the Chronicles.
Place in the books
Calormen gives the Chronicles a wider world. Its court life, language, religion, and military reach make Narnia feel like one kingdom among others rather than a sealed fairyland.
It also matters because Lewis uses Calormen to stage questions of power, imperial ambition, and cultural difference in a way the series could not manage if every neighboring land felt the same.