id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-6357		List of ancient spiral stairs - Wikipedia			.html	text/html	1146	201	71	List of ancient spiral stairs Wikipedia Although the oldest example dates back to the 5th century BC,[1] it was only in the wake of the influential design of the Trajan's Column that this space-saving new type permanently caught hold in ancient Roman architecture.[2] Apart from the triumphal columns in the imperial cities of Rome and Constantinople, other types of buildings such as temples, thermae, basilicas and tombs were also fitted with spiral stairways.[2] Their notable absence in the towers of the Aurelian Wall indicates that they did not yet figure prominently in Roman military engineering.[2] By late antiquity, separate stair towers were constructed adjacent to the main buildings, like in the Basilica of San Vitale. Jones, Mark Wilson (1993), "One Hundred Feet and a Spiral Stair: The Problem of Designing Trajan's Column", Journal of Roman Archaeology, 6: 23–38, doi:10.1017/S1047759400011454	./cache/en-wikipedia-org-6357.html	./txt/en-wikipedia-org-6357.txt