Changling is the tomb of emperor Yongle (reigned 1403-1424), the third emperor of
the Ming Dynasty whose personal name was Zhu Di, and of his empress. Built in 1413, the mausoleum extends over an area of 100,000 square metres. The soul tower, which tells people whose tomb it is, rests on a circular wall called the "city of treasures" which surrounds the burial mound. The "city of treasures" at Changling has a length of more than a kilometre.