sentences:  Jayapida constructed a monument at Prayag, which existed at Kalhana's time.In his memoirs on India, Huien Tsang, the Chinese Buddhist monk and chronicler who travelled through India during Harshavardhana's reign (A.D. 607–647), writes that he visited Prayaga in A.D. 643.In contrast to the account of Xuanzang, the Muslim historians mention the tree to be located at the confluence of the rivers.