Emperor Taizong of Tang, previously Prince of Qin, personal name Li Shimin, was the second emperor of the Tang dynasty of China, ruling from 626 to 649. He is traditionally regarded as a co-founder of the dynasty for his role in encouraging his father Li Yuan to rebel against the Sui dynasty at Jinyang in 617. Taizong subsequently played a pivotal role in defeating several of the dynasty's most dangerous opponents and solidifying its rule over China proper.
Portrait of Emperor Taizong of Tang on a hanging scroll, created during the Ming dynasty era, kept in the National Palace Museum, Taipei, Taiwan
A portrait of Emperor Yang of Sui, by the Tang court artist Yan Liben (600–673)
Portrait painting of Emperor Gaozu of Tang, father of Li Shimin
Armoured horseman, Tang dynasty
Throughout Chinese history, "Emperor" was the superlative title held by the monarchs who ruled various imperial dynasties. In traditional Chinese political theory, the emperor was the "Son of Heaven", an autocrat with the divine mandate right to rule all under Heaven. Emperors were worshiped posthumously under an imperial cult. The lineage of emperors descended from a paternal family line constituted a dynasty, and succession in most cases theoretically followed agnatic primogeniture.
Qin Shi Huang, the first emperor of China (r. 221–210 BC)
Qin Shi Huang escaping assassination (3rd century AD)
An 18th century depiction of Wu Zetian, the only female emperor of China
Yellow Emperor