The Ikshavakus arose on the ruins of Satavahana power in eastern part of the peninsula in India. The Ikshavakus left behind many monuments at Nagarjunkonda and Dharanikota. They were a local tribe.
Viharas were for the purpose of living, Chaityas were assemblies for the purpose of discussions. Further, Chaityas were with Stupas, Viharas did not have stupas.