Location: Xi'an
Description: Xi'an city was built on the foundation of "han Jian's New City" towards the end of the Tang Dynasty.When being reconstructed during the period 1374-1378 A.D.(seventh to eleventh year of Hongwu of the Ming ), the city wall was extended by a quarter to both east and north to make Xi'an city today's size.The blue brick Xi'an city wall is well preserved .Lofty and magnificent towrs with blue and green paintings were constructed on the four city gates.