Tianxia (Chinese: 天下; pinyin: Tiānxià; lit. '[everything] under Heaven') is a Chinese term for a historical Chinese cultural concept that denoted either the entire geographical world or the metaphysical realm of mortals, and later became associated with political sovereignty. In ancient China and imperial China, tianxia denoted the lands, space, and area divinely appointed to the Chinese sovereign by universal and well-defined principles of order. The center of this land was directly apportioned to the Chinese court, forming the center of a world view that centered on the Chinese court and went concentrically outward to major and minor officials and then the common subjects, tributary states, and finally ending with fringe barbarians.
The center of this world view was not exclusionary in nature, and outer groups, such as ethnic minorities and foreign people, who accepted the mandate of the Chinese Emperor were themselves received and included into the Chinese tianxia. In classical Chinese political thought, the "Son of Heaven", having received the Mandate of Heaven, would nominally be the ruler of the entire world. Although in practice there would be areas of the known world which were not under the control of the Chinese monarch, in Chinese political theory the rulers of those areas derived their power from the Chinese monarch.
