 The supreme Daoist deities are the Three Clarities (or Three Pures, Sanqing), each of which rules over one heaven (for their names, see  §3.4).  They are associated with different pre-cosmic eras and are deemed to be at the origins of the textual corpora associated with the Three Caverns. Along the history of Daoism, the Three Clarities have been supplemented, but never replaced, by other deities that effectively might share with them the title of “highest Daoist deities”. Most important among them are Taiyi, or Great One, who represents the fundamental Unity of the cosmos in a deified form; and Yuhuang, or Jade Sovereign, the highest god of popular religion before his incorporation in the Daoist pantheon in the Song period.