Daejongism (Korean: 대종교, 大倧敎 Daejonggyo or Taejongkyo, "religion of the Divine Progenitor" or "great ancestral religion") or Dangunism (Korean: 단군교, 檀君敎 Dangungyo or Tangunkyo, "religion of Dangun") is the name of a number of religious movements within the framework of Korean shamanism, focused on the worship of Dangun (or Tangun). There are around seventeen of these groups, the main one of which was founded in Seoul in 1909 by Na Cheol (나철, 1864-1916).