Changling (长陵 in Chinese) is the largest and most significant of the Ming tombs open to the public. It is the mausoleum of Yong Le (1360-1424), the third emperor of the Ming dynasty and his wife Xushi. The construction of the main structure, the underground palace, began in 1409 and was completed in 1427. The tomb site consists of the underground palace with a burial chamber and a surface palace.