Emperor Dezong of Tang, personal name Li Kuo, was an emperor of the Chinese Tang dynasty and the oldest son of Emperor Daizong. His reign of 26 years was the third longest in the Tang dynasty. Emperor Dezong started out as a diligent and frugal emperor and he tried to reform the governmental finances by introducing new tax laws. His attempts to destroy the powerful regional warlords and the subsequent mismanagement of those campaigns, however, resulted in a number of rebellions that nearly destroyed him and the Tang dynasty. After those events, he dealt cautiously with the regional governors, causing warlordism to become unchecked, and his trust of eunuchs caused the eunuchs' power to rise greatly. He was also known for his paranoia about officials' wielding power, and late in his reign, he did not grant much authority to his chancellors.
Emperor Dezong of Tang
Chongling (崇陵), tomb of Emperor Dezong, in Jingyang County, Shaanxi
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