Number 18 of the Irish Historic Towns Atlas series, Armagh contains a topographical section that lists historical and archaeological details of over 1,200 sites, and an essay tracing the development of the city from its earliest origins to 1900. It includes: the earliest map of Armagh from 1602; maps showing Armagh in 1760 and 1766; a large colour reconstruction of the city in c. 1834; a growth map of Armagh to 1900; and a number of smaller black and white maps, which illustrate the text section. It features late nineteenth-century photographs of Armagh. The maps and text are large format and bound in a fascicle.