Xi'an is the capital of the Shaanxi province, and a sub-provincial city in the People's Republic of China. One of the oldest cities in China, with more than 3,100 years of history, the city was known as Chang'an before the Ming Dynasty. It is one of the Four Great Ancient Capitals of China, having held that position under several of the most important dynasties in Chinese history, including Zhou, Qin, Han, Sui, and Tang. It is the eastern terminus of the Silk Road and home to the Terracotta Army. Xi'an is, for certain, one of the most popular tourist destinations among foreign travelers. A tour to Xi'an is something that any tourist to China would not want to miss, as it serves as a window on China's ancient civilization.