Tashbaan

Tashbaan was the capital of Calormen, a city built on an island in the delta of the River Calormen. The city was surrounded by a great wall that rises out of the river, reached by long bridges on both banks, providing the only way to travel over the river for many miles. The banks of the river were lined with gardens and country houses. Though the city was hot and crowded, the streets were fine and it was home to magnificent palaces and gardens. The city was built on a natural slope, rising up to the palace of the Tisroc, and the great Temple of Tash at the pinnacle of the hill. The palace of the Tisroc was often described as magnificent beyond description, and opened onto gardens that run all the way down to the river wall. It is unknown when the city was built, though it had been the capital of Calormen and home to the Tisroc for many years.

-baan
The suffix -baan may mean 'city', as the city of Tehishbaan is mentioned in The Last Battle. However, some cities did not have this suffix, such as Azim Balda. It may also mean "house" (or some synonym thereof), referring to the fact that the temple of Tash is located there.

In the Disney version of Prince Caspian, Tashbaan pledges its troops to King Miraz. Tashbaan