Title: Chang'an
Content:   The Han capital was located 3 km northwest of modern Xi'an. As the capital of the Western Han, it was the political, economic and cultural center of China. It was also the eastern terminus of the Silk Road, and a cosmopolitan metropolis. It was a consumer city, a city whose existence was not primarily predicated upon manufacturing and trade, but rather boasted such a large population because of its role as the political and military center of China. By 2 AD, the population was 246,200 in 80,000 households. This population consisted mostly of the scholar gentry class whose education was being sponsored by their wealthy aristocratic families. In addition to these civil servants there was a larger underclass to serve 
Title: Chang'an
Content:  Mang was killed and decapitated by the rebels two days later. After the Western Han period, the Eastern Han government settled on Luoyang as the new capital. Chang'an was therefore also sometimes referred to as the Western Capital or Xijing (西京) in some Han dynasty texts. In 190 AD during late Eastern Han, the court was seized and relocated back to Chang'an by the notorious Prime Minister Dong Zhuo, as it was a strategically superior site against the mounting insurgency formed against him. After Dong's death (192) the capital was moved back to Luoyang in August 196, and to Xuchang in autumn 196. By this time, Chang'an was already regarded as the symbolic site of supreme power and governance.
Title: Chang'an
Content:   Chang'an is the traditional name of Xi'an. The site had been settled since Neolithic times, during which the Yangshao culture was established in Banpo, in the city's suburbs. Furthermore, in the northern vicinity of modern Xi'an, Qin Shi Huang of the Qin dynasty, China's first emperor, held his imperial court, and constructed his massive mausoleum guarded by the Terracotta Army. From its capital at Xianyang, the Qin dynasty ruled a larger area than either of the preceding dynasties. The imperial city of Chang'an during the Han dynasty was located northwest of today's Xi'an. During the Tang dynasty, the area that came to be known as Chang'an included the area inside the Ming Xi'an fortification, plus some 
Title: 195 BC
Content: Chang'an, the capital of China, is thought to become the largest city in the world at this time, taking over from Pataliputra, the capital of the Mauryan empire. 
Title: Chang'an
Content:  and second, it allowed him to redirect their energy toward defending the capital from invasion by the nearby Xiongnu. His adviser Liu Jing described this plan as weakening the root while strengthening the branch. After the necessary political structure was set up, the area of the capital was divided into three prefectures and construction began. At its founding in 195 BC, the population of Changan was 146,000. During the reign of Emperor Wu of Han, the diplomat Zhang Qian was dispatched westward into Central Asia. Subsequently, Chang'an city became the Asian gateway to Europe as the point of departure of the Silk Road. On 4 October 23 AD, Chang'an was captured and sacked during a peasant rebellion. The emperor, 
Title: Chang'an
Content:  The once prosperous Tang capital abruptly declined after the end of the Tang Dynasty. In 880, the rebel Huang Chao sacked the city, destroying much of it. When the warlord Zhu Quanzhong attacked the city again 25 years later, the capital was moved from Chang'an to Luoyang, and much of the city was abandoned and fell into disrepair. Soon, most of the city was overrun by nature and was used for agriculture. The former imperial city was modified into a much smaller city. Then the northern and eastern city wall was expanded a little and the official name of city was changed from Jingzhao, which means capital city, to Xi'an in Ming Dynasty.
Title: Chang'an
Content:  Both Sui and Tang empires occupied the same location. In 582, Emperor Wen of the Sui dynasty sited a new region southeast of the much ruined Han Dynasty Chang'an to build his new capital, which he called Daxing (大興, “Great Prosperity”). Daxing was renamed Chang'an in the year 618 when the Duke of Tang, Li Yuan, proclaimed himself the Emperor Gaozu of Tang. Chang'an during the Tang dynasty (618–907) was, along with Constantinople (Istanbul) and Baghdad, one of the largest cities in the world. It was a cosmopolitan urban center with considerable foreign populations from other parts of Asia and beyond. This new Chang'an was laid 
Title: Chang'an
Content:  Chang'an was briefly the capital of the Western Jin dynasty from 312 to 316. It was also the capital of Former Zhao (318–329), Former Qin (351–385) and Later Qin (384–417). In 417, a century after the Western Jin lost Chang'an, the city reconquered by Liu Yu of Eastern Jin, who founded the Liu Song dynasty in 420. The city was lost to Northern Wei by 439. When Northern Wei split in two, Chang'an became the capital of Western Wei (535–557), and also of its successor state Northern Zhou (557–581).
Title: 637
Content: Chang'an, capital of the Tang Dynasty (China), becomes the largest city of the world, taking the lead from Ctesiphon, capital of Persia. ; Queen Seondeok of Silla (Korea) builds near Gyeongju an astronomical observatory (Cheomseongdae), one of the oldest in East Asia. ; King Songtsän Gampo builds the first palace on the site of the Potala Palace in Lhasa (Tibet). 
Title: Xi'an
Content:  Xi'an (, ;     ; Chinese: ), alternately romanized as Sian, is the capital of Shaanxi Province. A sub-provincial city on the Guanzhong Plain in Northwest China, it is one of the oldest cities in China, the oldest prefecture capital and one of the Chinese Four Great Ancient Capitals, having held the position under several of the most important dynasties in Chinese history, including Western Zhou, Qin, Western Han, Sui, Northern Zhou and Tang. The city is the starting point of the Silk Road and home to the UNESCO World Heritage set Terracotta Army of Emperor Qin Shi Huang. Since the 

Question: What is Chang'an the capital of?
Answer: Western Wei.
Western Yan.
Former Qin.
Qian Qin.
Later Qin.
Xin dynasty.
Xin chao.
New dynasty.
Northern Zhou.
Bei Zhou.
Han dynasty.
Han Empire.
Han.
Han China.
Sui dynasty.
Sui Dynasty.
Tang Empire.
Tang China.
Tang.
Tang dynasty.
Tang Dynasty.