Albert Frederick Calvert,
Toledo: an historical and descriptive account of the "City of generations"
“ These bear a resemblance to the outer or circular tower of the Puerta del Sol. The windows and arches exhibit Moorish, or rather Mudejar, influence. The castle in its day must have been a fine specimen of the mediæval stronghold. To-day its ruin is complete. It serves as a home to the owl and the bat, and the very ghosts of monks and templars seem to have deserted it as uninhabitable. ”
