Xi'an is more than 3,000 years old and was known as Chang'an in ancient times. For 1,000 years, the city was the capital for 13 dynasties, and a total of 73 emperors ruled here. It is one of the oldest cities in China and the oldest of the Four Great Ancient Capitals. Xi'an is also the starting point of the Silk Road.
Xi'an means "Western Peace" and as of 2015, had a population of 8.7 million people.
Fun fact: Xi'an was the first city in China to be introduced to Islam. The Emperor of the Tang Dynasty officially allowed the practice of Islam in AD 651. Xi'an has a large Muslim community, the significant majority are from the Hui ethnic minority.