Imperial titles were used in various historical Korean states before the 14th century and at the turn of the 20th century: Early Korean states used "great king", "greatest king", and "holy king"; later Korean states used "emperor". Korean monarchs who used imperial titles had political and religious authority over a realm or domain. The Chinese concept of tianxia, pronounced "cheonha" in Korean, was variously adopted and adapted to Korean views of the world from period to period.[1]