Overview:

A Hyborian kingdom south of Ophir, Corinthia, and Zamora, North of Shem and Argos, and bordered on the east by Khoraja and Khauran. Koth is now ruled by the mad Emperor Strabonus. It is whispered that the Emperor dabbles in forbidden magics to fulfill his ambition: to restore the fallen empire of Acheron. Koth worships the gods of Shem. Their worship is tainted though with the beliefs of ancient Acheron, giving Kothian religion a Stygian cast. Its ancient capital, Khorshemish, is the center of the armor-making industry that is Koth's pride.

"Before midnight they crossed the Ophirean border and at dawn the spires of Khorshemish stood up gleaming and rose-tinted on the southeastern horizon, the slim towers overawed by the grim scarlet citadel that at a distance was like a splash of bright blood in the sky. (...) From the walls of the citadel one could look down on the broad white streets of the city, on minareted mosques, shops, temples and markets. One could look down, too, on the palaces of the king, set in broad gardens, high-walled, luxurious riots of fruit trees and blossoms, through which artificial streams murmured, and silvery fountains rippled incessantly. Over all brooded the citadel, like a condor stooping above its prey, intent on its own dark meditations."

Robert E. Howard: "The Scarlet Citadel"