Calormene religion

Calormene Paganism or Calormene Polytheism, also possibly (but disputedly) called Calormenism or Tashism, was the official religion of Calormen, an imperial country in the World of Narnia.

The Calormene faith was polytheistic, meaning the Calormenes worshipped many gods. The most well-known, powerful, and horrible of all was the god Tash who had a vulture-like head and four arms.

Male Calormenes wore turbans. This was likely associated with these religious beliefs.

Trivia
It has been widely speculated that C. S. Lewis was comparing Calormene religion to devout Muslims; however, Lewis had also praised aspects of Islam in some of his works and the name "Aslan" itself is from the Arabi language, spoken by many Muslims, which means "lion."