life Of Nagarjuna
Very little is reliably known of the life of Nagarjuna and modern historians do not agree on a specific date or place for him. The earliest surviving accounts were written in Chinese and Tibetan centuries after his death and are mostly hagiographical accounts that are historically unverifiable.

Some scholars such as Joseph Walser argue that Nāgārjuna was an advisor to a king of the Sātavāhana dynasty which ruled the Deccan Plateau in the second century. This is supported by most of the traditional hagiographical sources as well. Archaeological evidence at Amarāvatī indicates that if this is true, the king may have been Yajna Sri Satakarni. On the basis of this association, Nagarjuna is conventionally placed at around 150–250 CE.


A model of the Amaravati Stupa
Walser thinks that it is most likely that when Nagarjuna wrote the Ratnavali, he lived in a mixed monastery in which Mahāyānists were the minority. The most likely sectarian affiliation of the monastery according to Walser was Purvasailya, Aparasailya, or Caityaka

He also argues that "it is plausible that he wrote the Ratnavali within a thirty-year period at the end of the second century in the Andhra region around Dhanyakataka (modern-day Amaravati)."