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Veturi Prabhakara Sastry in 1900s mentioned the existence of Pre-Nannayya Chandassu in Raja Raja Narendra Pattabhisheka Sanchika.[3] Accurate dating of this piece of literature happened after the 1980s discoveries in Karimnagar.[4][5][6] Rechana's work is variously dated from 940 CE to 12th and 13th century. Most scholars date him to post-Nannaya period.[citation needed]