 These lists are supplemented with astronomical interpretations, which are also used to reach an earlier dating for the Rigveda.Along with this comes a redating of historical personages and events, in which the Buddha is dated to 1700 BCE or even 3139/8 BCE, and Chandragupta Maurya (c. 300 BCE) is replaced by Chandragupta, the Gupta king.Elst notes that