Xi'an (Chinese: 西安; pinyin: Xī'ān; Wade-Giles: Hsi-An; Postal map spelling: Sian[1]; historically known as Cháng'ān[1]), is the capital of the Shaanxi province in the People's Republic of China and a sub-provincial city. As one of the oldest cities in Chinese history, Xi'an is one of the Four Great Ancient Capitals of China because it has been the capital (under various names) of some of the most important dynasties in Chinese history,[2] including the Zhou, Qin, Han, the Sui, and Tang dynasties.[2] Xi'an is the eastern terminus of the Silk Road and known as the site of the Terracotta Army, made during the Qin Dynasty.[1] The city has more than 3,100 years of history, and was known as Chang'an (traditional Chinese: 長安; simplified Chinese: 长安; pinyin: Cháng'ān; literally "Perpetual Peace") before the Ming Dynasty.

From: Wikipedia
Image: Drum Tower, Xi'an by: Bobak