Great Wall of China
Aiton's Encyclopedia (1910)
a defensive wall following the northern boundary of China proper. It is the most extensive defensive work ever undertaken by man. It is said, on what authority we do not know, to represent the labor of 7,000,000 men for ten years. It was completed about 214 B. C., and was intended to put a stop to the invasions of the Tartar tribes. It extends from the vicinity of the sea, northeast of Peking, far into the desert northwest of China. It is 1,500 miles in length. It follows the natural contour of the country, rising over mountains, dipping down into valleys, and crossing rivers without a break. It differs greatly in construction. Some portions are little more than huge walls of loose earth and gravel. The typical construction, however, is thoroughly workmanlike in manner. The wall rests on a stone foundation twenty-five feet in width; retaining walls of brick, rising to a height of from fifteen to thirty feet, slope toward each other; so that the wall is about fifteen feet wide on the top. The space between these walls is filled in with earth and gravel; the top is paved with brick and defended by a parapet about six feet high with loop holes. The wall is further protected by strong towers at short intervals. The various roadways are spanned by massive arches of sufficient height to allow the passage of camels with their burdens. Portions of the wall are in ruins; yet other portions again are as firm apparently as when first built over 2,000 years ago. The paved roadway along the top of the wall is overgrown with weeds and grass. See Chinese Empire ; Tartars
What Has Changed in the Last Century
Aiton's in 1910 treated the Wall as one structure "completed about 214 B. C." and 1,500 miles long. Archaeology has since separated the layers: the Qin wall of 214 BC was largely rammed earth and ran farther north, while the brick-faced wall with parapets and towers that visitors photograph is mostly Ming work of the 15th to 17th centuries. A Chinese state survey measured the Ming wall at about 8,850 km in 2009 and, counting all dynasties' walls, ditches and natural barriers, reported 21,196 km in 2012. The site became a UNESCO World Heritage listing in 1987, and mass tourism at Badaling now coexists with long stretches crumbling untended — along with the persistent modern myth, unknown to Aiton's, that the Wall is visible from space with the naked eye.
Written for this edition, 2026.