continued to be held in a diffuse, feudal system after the ascension of the Fifth Dalai Lama. Power in Tibet was held by a number of traditional elites, including members of the nobility, the heads of the major Buddhist sects (including their various tulkus), and various large and influential monastic communities. The Bogd Khanate period of Mongolia (1911–19) is also cited as a former Buddhist theocracy. China Similar to the Roman Emperor, the Chinese sovereign was historically held to be the Son of Heaven. However, from the first historical Emperor on, this was largely ceremonial and tradition quickly established it as a posthumous dignity, like the Roman institution. The situation before Qin Shi Huang Di is less clear. The Shang dynasty essentially functioned as a theocracy, declaring the ruling family the sons of heaven and calling the chief sky god Shangdi after a word for their deceased ancestors. After their overthrow by the Zhou, the royal clan of Shang were not eliminated but instead moved to a ceremonial capital where they were charged to continue the performance of their rituals. The titles combined by Shi Huangdi to form his new title of emperor were originally applied to god-like beings who ordered the heavens and earth and to culture heroes credited with the invention of agriculture, clothing, music, astrology, etc. Even after the fall of Qin, an emperor's words were considered sacred edicts () and his written proclamations "directives from above" (). As a result, some Sinologists translate the title huangdi (usually rendered "emperor") as thearch. The term properly refers to the head of a thearchy (a kingdom of gods), but the more specific "theocrat" carries associations of a strong priesthood that would be generally inaccurate in describing imperial China. Others reserve the use of "thearch" to describe the legendary figures of Chinese prehistory while continuing to use "emperor" to describe historical rulers. The Heavenly Kingdom of Great Peace in 1860s Qing China was a heterodox Christian theocracy led by a person who said that he was the younger brother of Jesus Christ, Hong Xiuquan. This theocratic state fought one of the most destructive wars in history, the Taiping Rebellion, against the Qing dynasty for fifteen years before being crushed following the fall of the rebel capital Nanjing. Caliphate The Sunni branch of Islam stipulates that, as a head of state, a Caliph should be selected or elected by Muslims or